diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 1024882..114e7db 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -152,3 +152,39 @@ test:ubuntu-jammy:
   except:
     - tags
 
+# Ubuntu 24.04 LTS (noble)
+build:ubuntu-noble:
+  tags:
+    - pwmt
+  stage: build
+  image: registry.pwmt.org/pwmt/gitlab-runner-images/ubuntu:noble
+  script:
+    - meson subprojects update
+    - mkdir -p build && cd build
+    - meson --force-fallback-for=girara ..
+    - ninja
+  cache:
+    <<: *girara_cache
+  artifacts:
+    expire_in: 6 hours
+    paths:
+      - build
+  except:
+    - tags
+
+test:ubuntu-noble:
+  tags:
+    - pwmt
+  stage: test
+  image: registry.pwmt.org/pwmt/gitlab-runner-images/ubuntu:noble
+  script:
+    - cd build
+    - ninja test
+  cache:
+    <<: *girara_cache
+    policy: pull
+  dependencies:
+    - build:ubuntu-noble
+  except:
+    - tags
+
diff --git a/data/bash-completion.in b/data/bash-completion.in
index cd65896..14b0913 100644
--- a/data/bash-completion.in
+++ b/data/bash-completion.in
@@ -1,4 +1,3 @@
-#!/bin/bash
 _zathura() {
   _init_completion 2>/dev/null || true
 
diff --git a/doc/configuration/options.rst b/doc/configuration/options.rst
index efa2298..bc78cbf 100644
--- a/doc/configuration/options.rst
+++ b/doc/configuration/options.rst
@@ -154,7 +154,7 @@ General settings
    Defines the background color when displaying additional information for signatures with warnings.
 
    :type: String
-   :default: rgba(100%,%84,0%,0.9)
+   :default: rgba(100%,84%,0%,0.9)
 
 .. describe:: scroll-wrap
 
diff --git a/doc/man/zathurarc.5.rst b/doc/man/zathurarc.5.rst
index 142d457..f559807 100644
--- a/doc/man/zathurarc.5.rst
+++ b/doc/man/zathurarc.5.rst
@@ -915,7 +915,7 @@ zathura
   signatures with warnings.
 
   * Value type: String
-  * Default value: rgba(100%,%84,0%,0.9)
+  * Default value: rgba(100%,84%,0%,0.9)
 
 *show-directories*
   Defines if the directories should be displayed in completion.
diff --git a/meson.build b/meson.build
index 92623ee..3a4ea47 100644
--- a/meson.build
+++ b/meson.build
@@ -1,5 +1,5 @@
 project('zathura', 'c',
-  version: '0.5.3',
+  version: '0.5.4',
   meson_version: '>=0.61',
   default_options: ['c_std=c17', 'warning_level=3'],
 )
diff --git a/tests/meson.build b/tests/meson.build
index d2bed1d..1b2e81a 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -44,18 +44,18 @@ if check.found()
     test('session', xvfb,
       args: ['-a', '-s', '-screen 0 1400x900x24 -ac +extension GLX +render -noreset', session],
       timeout: 60*60
-    ) 
+    )
 
     if seccomp.found()
-    sandbox = executable('test_sandbox', ['test_sandbox.c', 'tests.c'],
-      dependencies: build_dependencies + test_dependencies,
-      include_directories: include_directories,
-      c_args: defines + flags
-    )
-    test('sandbox', xvfb,
-      args: ['-a', '-s', '-screen 0 1400x900x24 -ac +extension GLX +render -noreset', sandbox],
-      timeout: 60*60
-    )
-  endif
+      sandbox = executable('test_sandbox', ['test_sandbox.c', 'tests.c'],
+        dependencies: build_dependencies + test_dependencies,
+        include_directories: include_directories,
+        c_args: defines + flags
+      )
+      test('sandbox', xvfb,
+        args: ['-a', '-s', '-screen 0 1400x900x24 -ac +extension GLX +render -noreset', sandbox],
+        timeout: 60*60
+      )
+    endif
   endif
 endif
diff --git a/zathura/config.c b/zathura/config.c
index 69a7188..751e119 100644
--- a/zathura/config.c
+++ b/zathura/config.c
@@ -295,7 +295,7 @@ void config_load_default(zathura_t* zathura) {
   girara_setting_set(gsession, "signature-success-color", "rgba(18%,80%,33%,0.9)");
   girara_setting_add(gsession, "signature-warning-color", NULL, STRING, false,
                      _("Color used to highlight signatures with warnings"), cb_color_change, NULL);
-  girara_setting_set(gsession, "signature-warning-color", "rgba(100%,%84,0%,0.9)");
+  girara_setting_set(gsession, "signature-warning-color", "rgba(100%,84%,0%,0.9)");
   girara_setting_add(gsession, "signature-error-color", NULL, STRING, false,
                      _("Color used to highlight invalid signatures"), cb_color_change, NULL);
   girara_setting_set(gsession, "signature-error-color", "rgba(92%,11%,14%,0.9)");
diff --git a/zathura/seccomp-filters.c b/zathura/seccomp-filters.c
index 8e4bb7f..fa88450 100644
--- a/zathura/seccomp-filters.c
+++ b/zathura/seccomp-filters.c
@@ -86,7 +86,7 @@ seccomp_enable_basic_filter(void)
   DENY_RULE(migrate_pages);
   DENY_RULE(modify_ldt);
   DENY_RULE(mount);
-#ifdef __NR_mount_setattr 
+#if defined(__NR_mount_setattr) && defined(__SNR_mount_setattr)
   DENY_RULE(mount_setattr);
 #endif
   DENY_RULE(move_pages);
@@ -153,7 +153,7 @@ seccomp_enable_strict_filter(zathura_t* zathura)
    * allowing for a potential fallback function to execute 
    * scmp_filter_ctx ctx = seccomp_init(SCMP_ACT_ERRNO(ENOSYS));*/
   scmp_filter_ctx ctx = seccomp_init(SCMP_ACT_KILL_PROCESS);
-  if (ctx == NULL){
+  if (ctx == NULL) {
     girara_error("seccomp_init failed");
     return -1;
   }
@@ -254,7 +254,7 @@ seccomp_enable_strict_filter(zathura_t* zathura)
 #ifdef GDK_WINDOWING_X11
   GdkDisplay* display = gtk_widget_get_display(zathura->ui.session->gtk.view);
 
-  if (GDK_IS_X11_DISPLAY (display)) {
+  if (GDK_IS_X11_DISPLAY(display)) {
     girara_debug("On X11, supporting X11 syscalls");
     girara_warning("Running strict sandbox mode on X11 provides only \
         incomplete process isolation.");
@@ -269,14 +269,13 @@ seccomp_enable_strict_filter(zathura_t* zathura)
     ALLOW_RULE(connect);
     ALLOW_RULE(umask);
     ALLOW_RULE(uname);
-    ALLOW_RULE(shmat); 
+    ALLOW_RULE(shmat);
     ALLOW_RULE(shmctl);
     ALLOW_RULE(shmdt);
     ALLOW_RULE(shmget);
     ALLOW_RULE(recvfrom);
     ALLOW_RULE(writev); /* pwritev, pwritev2 */
-  }
-  else {
+  } else {
     girara_debug("On Wayland, blocking X11 syscalls");
   }
 #endif
@@ -339,16 +338,13 @@ seccomp_enable_strict_filter(zathura_t* zathura)
   ERRNO_RULE(openat2);
   ERRNO_RULE(faccessat2);
   ERRNO_RULE(pwritev2);
-#ifdef __NR_readfile
+#if defined(__NR_readfile) && defined(__SNR_readfile)
   ERRNO_RULE(readfile);
 #endif
-#ifdef __NR_fchmodat2
+#if defined(__NR_fchmodat2) && defined(__SNR_fchmodat2)
   ERRNO_RULE(fchmodat2);
 #endif
 
-
-
-
   /* Sandbox Status Notes:
    *
    * write: no actual files on the filesystem are opened with write permissions 
@@ -373,11 +369,9 @@ seccomp_enable_strict_filter(zathura_t* zathura)
    *
    */
 
-
   /* when zathura is run on wayland, with X11 server available but blocked, unset the DISPLAY variable */
   /* otherwise it will try to connect to X11 using inet socket protocol */
 
-
   /* applying filter... */
   if (seccomp_load(ctx) >= 0) {
     /* free ctx after the filter has been loaded into the kernel */
diff --git a/zathura/utils.c b/zathura/utils.c
index ae7cd70..802757f 100644
--- a/zathura/utils.c
+++ b/zathura/utils.c
@@ -60,7 +60,7 @@ file_valid_extension(zathura_t* zathura, const char* path)
   zathura_plugin_t* plugin = zathura_plugin_manager_get_plugin(zathura->plugins.manager, content_type);
   g_free(content_type);
 
-  return (plugin == NULL) ? false : true;
+  return plugin == NULL;
 }
 
 static void
@@ -100,34 +100,29 @@ void document_index_build(GtkTreeModel* model, GtkTreeIter* parent, girara_tree_
   }
 }
 
-zathura_rectangle_t
-rotate_rectangle(zathura_rectangle_t rectangle, unsigned int degree, double height, double width)
-{
+zathura_rectangle_t rotate_rectangle(zathura_rectangle_t rectangle, unsigned int degree, double height, double width) {
   zathura_rectangle_t tmp;
   switch (degree) {
-    case 90:
-      tmp.x1 = height - rectangle.y2;
-      tmp.x2 = height - rectangle.y1;
-      tmp.y1 = rectangle.x1;
-      tmp.y2 = rectangle.x2;
-      break;
-    case 180:
-      tmp.x1 = width - rectangle.x2;
-      tmp.x2 = width - rectangle.x1;
-      tmp.y1 = height - rectangle.y2;
-      tmp.y2 = height - rectangle.y1;
-      break;
-    case 270:
-      tmp.x1 = rectangle.y1;
-      tmp.x2 = rectangle.y2;
-      tmp.y1 = width - rectangle.x2;
-      tmp.y2 = width - rectangle.x1;
-      break;
-    default:
-      tmp.x1 = rectangle.x1;
-      tmp.x2 = rectangle.x2;
-      tmp.y1 = rectangle.y1;
-      tmp.y2 = rectangle.y2;
+  case 90:
+    tmp.x1 = height - rectangle.y2;
+    tmp.x2 = height - rectangle.y1;
+    tmp.y1 = rectangle.x1;
+    tmp.y2 = rectangle.x2;
+    break;
+  case 180:
+    tmp.x1 = width - rectangle.x2;
+    tmp.x2 = width - rectangle.x1;
+    tmp.y1 = height - rectangle.y2;
+    tmp.y2 = height - rectangle.y1;
+    break;
+  case 270:
+    tmp.x1 = rectangle.y1;
+    tmp.x2 = rectangle.y2;
+    tmp.y1 = width - rectangle.x2;
+    tmp.y2 = width - rectangle.x1;
+    break;
+  default:
+    return rectangle;
   }
 
   return tmp;
@@ -141,7 +136,6 @@ recalc_rectangle(zathura_page_t* page, zathura_rectangle_t rectangle)
   }
 
   zathura_document_t* document = zathura_page_get_document(page);
-
   if (document == NULL) {
     goto error_ret;
   }
@@ -159,7 +153,6 @@ recalc_rectangle(zathura_page_t* page, zathura_rectangle_t rectangle)
   return tmp;
 
 error_ret:
-
   return rectangle;
 }
 
@@ -301,14 +294,12 @@ running_under_wsl(void)
   return result;
 }
 
-typedef struct zathura_point_s
-{
-  unsigned int x;
-  unsigned int y;
+typedef struct zathura_point_s {
+  uintptr_t x;
+  uintptr_t y;
 } zathura_point_t;
 
-static int
-cmp_point(const void* va, const void* vb) {
+static int cmp_point(const void* va, const void* vb) {
   const zathura_point_t* a = va;
   const zathura_point_t* b = vb;
 
@@ -323,38 +314,32 @@ cmp_point(const void* va, const void* vb) {
   return a->x < b->x ? -1 : 1;
 }
 
-static unsigned int
-ufloor(double f) {
+static uintptr_t ufloor(double f) {
   return floor(f);
 }
 
-static unsigned int
-uceil(double f) {
+static uintptr_t uceil(double f) {
   return ceil(f);
 }
 
-static int
-cmp_uint(const void* vx, const void* vy) {
-  const unsigned int* x = vx;
-  const unsigned int* y = vy;
+static int cmp_uint(const void* vx, const void* vy) {
+  const uintptr_t x = (uintptr_t)vx;
+  const uintptr_t y = (uintptr_t)vy;
 
-  return *x == *y ? 0 : (*x > *y ? 1 : -1);
+  return x == y ? 0 : (x > y ? 1 : -1);
 }
 
-static int
-cmp_rectangle(const void* vr1, const void* vr2) {
+static int cmp_rectangle(const void* vr1, const void* vr2) {
   const zathura_rectangle_t* r1 = vr1;
   const zathura_rectangle_t* r2 = vr2;
 
-  return (ufloor(r1->x1) == ufloor(r2->x1) && uceil(r1->x2) == uceil(r2->x2) &&
-          ufloor(r1->y1) == ufloor(r2->y1) && uceil(r1->y2) == uceil(r2->y2))
-           ? 0
-           : -1;
+  return (ufloor(r1->x1) == ufloor(r2->x1) && uceil(r1->x2) == uceil(r2->x2) && ufloor(r1->y1) == ufloor(r2->y1) &&
+          uceil(r1->y2) == uceil(r2->y2))
+             ? 0
+             : -1;
 }
 
-
-static bool
-girara_list_append_unique(girara_list_t* l, girara_compare_function_t cmp, void* item) {
+static bool girara_list_append_unique(girara_list_t* l, girara_compare_function_t cmp, void* item) {
   if (girara_list_find(l, cmp, item) != NULL) {
     return false;
   }
@@ -363,8 +348,7 @@ girara_list_append_unique(girara_list_t* l, girara_compare_function_t cmp, void*
   return true;
 }
 
-static void
-append_unique_point(girara_list_t* list, const unsigned int x, const unsigned int y) {
+static void append_unique_point(girara_list_t* list, const uintptr_t x, const uintptr_t y) {
   zathura_point_t* p = g_try_malloc(sizeof(zathura_point_t));
   if (p == NULL) {
     return;
@@ -378,10 +362,9 @@ append_unique_point(girara_list_t* list, const unsigned int x, const unsigned in
   }
 }
 
-static void
-rectangle_to_points(void* vrect, void* vlist) {
+static void rectangle_to_points(void* vrect, void* vlist) {
   const zathura_rectangle_t* rect = vrect;
-  girara_list_t* list = vlist;
+  girara_list_t* list             = vlist;
 
   append_unique_point(list, ufloor(rect->x1), ufloor(rect->y1));
   append_unique_point(list, ufloor(rect->x1), uceil(rect->y2));
@@ -389,25 +372,15 @@ rectangle_to_points(void* vrect, void* vlist) {
   append_unique_point(list, uceil(rect->x2), uceil(rect->y2));
 }
 
-static void
-append_unique_uint(girara_list_t* list, const unsigned int v) {
-  unsigned int* p = g_try_malloc(sizeof(unsigned int));
-  if (p == NULL) {
-    return;
-  }
-
-  *p = v;
-
-  if (girara_list_append_unique(list, cmp_uint, p) == false) {
-    g_free(p);
-  }
+static void append_unique_uint(girara_list_t* list, const uintptr_t v) {
+  girara_list_append_unique(list, cmp_uint, (void*)v);
 }
 
 // transform a rectangle into multiple new ones according a grid of points
 static void cut_rectangle(const zathura_rectangle_t* rect, girara_list_t* points, girara_list_t* rectangles) {
   // Lists of ordred relevant points
-  girara_list_t* xs = girara_sorted_list_new2(cmp_uint, g_free);
-  girara_list_t* ys = girara_sorted_list_new2(cmp_uint, g_free);
+  girara_list_t* xs = girara_sorted_list_new(cmp_uint);
+  girara_list_t* ys = girara_sorted_list_new(cmp_uint);
 
   append_unique_uint(xs, uceil(rect->x2));
   append_unique_uint(ys, uceil(rect->y2));
@@ -424,17 +397,17 @@ static void cut_rectangle(const zathura_rectangle_t* rect, girara_list_t* points
 
   double x = ufloor(rect->x1);
   for (size_t idx = 0; idx != girara_list_size(xs); ++idx) {
-    const unsigned int* cx = girara_list_nth(xs, idx);
-    double y               = ufloor(rect->y1);
+    const uintptr_t cx = (uintptr_t)girara_list_nth(xs, idx);
+    double y           = ufloor(rect->y1);
     for (size_t inner_idx = 0; inner_idx != girara_list_size(ys); ++inner_idx) {
-      const unsigned int* cy = girara_list_nth(ys, inner_idx);
+      const uintptr_t cy     = (uintptr_t)girara_list_nth(ys, inner_idx);
       zathura_rectangle_t* r = g_try_malloc(sizeof(zathura_rectangle_t));
 
-      *r = (zathura_rectangle_t){x, y, *cx, *cy};
-      y  = *cy;
+      *r = (zathura_rectangle_t){x, y, cx, cy};
+      y  = cy;
       girara_list_append_unique(rectangles, cmp_rectangle, r);
     }
-    x = *cx;
+    x = cx;
   }
 
   girara_list_free(xs);
diff --git a/zathura/zathura.c b/zathura/zathura.c
index c0ff579..95cf1f5 100644
--- a/zathura/zathura.c
+++ b/zathura/zathura.c
@@ -61,7 +61,6 @@ typedef struct zathura_document_info_s {
   char* search_string;
 } zathura_document_info_t;
 
-
 static gboolean document_info_open(gpointer data);
 
 #ifdef G_OS_UNIX
@@ -189,8 +188,7 @@ zathura_update_view_ppi(zathura_t* zathura)
   /* work around apparent bug in GDK: on Wayland, monitor geometry doesn't
    * return values in application pixels as documented, but in device pixels.
    * */
-  if (GDK_IS_WAYLAND_DISPLAY(display))
-  {
+  if (GDK_IS_WAYLAND_DISPLAY(display)) {
     /* not using the cached value for the scale factor here to avoid issues
      * if this function is called before the cached value is updated */
     const int device_factor = gtk_widget_get_scale_factor(zathura->ui.session->gtk.view);
@@ -211,9 +209,11 @@ zathura_update_view_ppi(zathura_t* zathura)
   }
 }
 
-static bool
-init_ui(zathura_t* zathura)
-{
+static void weak_ref_object_unref(void* data, GObject* UNUSED(object)) {
+  g_object_unref(data);
+}
+
+static bool init_ui(zathura_t* zathura) {
   if (girara_session_init(zathura->ui.session, "zathura") == false) {
     girara_error("Failed to initialize girara.");
     return false;
@@ -228,7 +228,8 @@ init_ui(zathura_t* zathura)
   GtkGesture* zoom = gtk_gesture_zoom_new(GTK_WIDGET(zathura->ui.session->gtk.view));
   g_signal_connect(zoom, "scale-changed", G_CALLBACK(cb_gesture_zoom_scale_changed), zathura);
   g_signal_connect(zoom, "begin", G_CALLBACK(cb_gesture_zoom_begin), zathura);
-  gtk_event_controller_set_propagation_phase(GTK_EVENT_CONTROLLER(zathura->ui.session->gtk.view), GTK_PHASE_BUBBLE);
+  gtk_event_controller_set_propagation_phase(GTK_EVENT_CONTROLLER(zoom), GTK_PHASE_BUBBLE);
+  g_object_weak_ref(G_OBJECT(zathura->ui.session->gtk.view), weak_ref_object_unref, zoom);
 
   /* zathura signals */
   zathura->signals.refresh_view = g_signal_new(
@@ -482,7 +483,7 @@ zathura_init(zathura_t* zathura)
   }
 
   /* disable unsupported features in strict sandbox mode */
-  if (zathura->global.sandbox != ZATHURA_SANDBOX_STRICT){
+  if (zathura->global.sandbox != ZATHURA_SANDBOX_STRICT) {
     /* database */
     init_database(zathura);
   }
@@ -760,7 +761,6 @@ prepare_document_open_from_stdin(const char* path)
   if (input_stream == NULL) {
     girara_error("Can not read from file descriptor.");
     return NULL;
-
   }
 
   GFileIOStream* iostream = NULL;
@@ -861,8 +861,7 @@ document_info_open(gpointer data)
       if (g_file_is_native(gf) == TRUE) {
         /* file was given as a native path */
         file = g_file_get_path(gf);
-      }
-      else {
+      } else {
         /* copy file with GIO */
         uri = g_file_get_uri(gf);
         file = prepare_document_open_from_gfile(gf);
@@ -1592,7 +1591,7 @@ document_close(zathura_t* zathura, bool keep_monitor)
 
   /* free predecessor buffer if we want to overwrite it or if we destroy the document for good */
   if (override_predecessor || !keep_monitor || !smooth_reload) {
-	  document_predecessor_free(zathura);
+    document_predecessor_free(zathura);
   }
 
   /* remove widgets */
diff --git a/zathura/zathura.h b/zathura/zathura.h
index 1b878e5..f28df54 100644
--- a/zathura/zathura.h
+++ b/zathura/zathura.h
@@ -234,10 +234,9 @@ struct zathura_s
    * Storage for gestures.
    */
   struct {
-	  double initial_zoom;
+    double initial_zoom;
   } gesture;
 
-
   /**
    * Context for MIME type detection
    */