diff --git a/meson.build b/meson.build
index e600a49a..bf9b241c 100644
--- a/meson.build
+++ b/meson.build
@@ -18,7 +18,7 @@ datadir = get_option('datadir')
 datadir_for_pc_file = join_paths('${prefix}', datadir)
 podir = join_paths(meson.source_root(), 'po')
 
-glib_req_version = '>= 2.56'
+glib_req_version = '>= 2.67.4'
 gtk_req_version = '>= 3.22'
 polkit_req_version = '>= 0.105'
 dazzle_req_version = '>= 3.30.0'
diff --git a/src/libsysprof-ui/rectangles.c b/src/libsysprof-ui/rectangles.c
index 2ac8ca05..9db41038 100644
--- a/src/libsysprof-ui/rectangles.c
+++ b/src/libsysprof-ui/rectangles.c
@@ -139,7 +139,7 @@ rectangles_sort (Rectangles *self)
 
           sysprof_color_cycle_next (self->cycle, &rgba);
           g_hash_table_insert (self->y_indexes, (gchar *)rect->name, GUINT_TO_POINTER (++sequence));
-          g_hash_table_insert (self->colors, (gchar *)rect->name, g_memdup (&rgba, sizeof rgba));
+          g_hash_table_insert (self->colors, (gchar *)rect->name, g_memdup2 (&rgba, sizeof rgba));
         }
     }
 
diff --git a/src/libsysprof-ui/sysprof-display.c b/src/libsysprof-ui/sysprof-display.c
index 6be5faf1..43b8a7d0 100644
--- a/src/libsysprof-ui/sysprof-display.c
+++ b/src/libsysprof-ui/sysprof-display.c
@@ -673,7 +673,7 @@ sysprof_display_present_async (SysprofDisplay       *self,
       return;
     }
 
-  g_task_set_task_data (task, g_memdup (&aids->len, sizeof aids->len), g_free);
+  g_task_set_task_data (task, g_memdup2 (&aids->len, sizeof aids->len), g_free);
 
   for (guint i = 0; i < aids->len; i++)
     {
diff --git a/src/libsysprof-ui/sysprof-mark-visualizer.c b/src/libsysprof-ui/sysprof-mark-visualizer.c
index 216cf62a..88cd6c83 100644
--- a/src/libsysprof-ui/sysprof-mark-visualizer.c
+++ b/src/libsysprof-ui/sysprof-mark-visualizer.c
@@ -252,7 +252,7 @@ sysprof_mark_visualizer_set_group_rgba (SysprofMarkVisualizer *self,
 
   g_hash_table_insert (self->rgba_by_group,
                        g_strdup (group),
-                       g_memdup (rgba, sizeof *rgba));
+                       g_memdup2 (rgba, sizeof *rgba));
 }
 
 void
diff --git a/src/libsysprof-ui/sysprof-marks-aid.c b/src/libsysprof-ui/sysprof-marks-aid.c
index 66b2c258..98744c91 100644
--- a/src/libsysprof-ui/sysprof-marks-aid.c
+++ b/src/libsysprof-ui/sysprof-marks-aid.c
@@ -278,7 +278,7 @@ sysprof_marks_aid_present_finish (SysprofAid    *aid,
                   dzl_rgba_shade (&rgba, &kind_rgba, 1 + (ratio * span->kind));
                   g_hash_table_insert (seen,
                                        GUINT_TO_POINTER (span->kind),
-                                       g_memdup (&kind_rgba, sizeof kind_rgba));
+                                       g_memdup2 (&kind_rgba, sizeof kind_rgba));
                 }
             }
 
diff --git a/src/libsysprof/binfile.c b/src/libsysprof/binfile.c
index 2f108739..145322ef 100644
--- a/src/libsysprof/binfile.c
+++ b/src/libsysprof/binfile.c
@@ -328,7 +328,7 @@ get_vdso_bytes (size_t *length)
                  * wrapper never returned that address. But since it
                  * is a legal mapping, it is legal to read it.
                  */
-                bytes = g_memdup ((uint8_t *)start, n_bytes);
+                bytes = g_memdup2 ((uint8_t *)start, n_bytes);
 
                 has_data = TRUE;
             }
diff --git a/src/libsysprof/sysprof-helpers.c b/src/libsysprof/sysprof-helpers.c
index 75463761..80a630d2 100644
--- a/src/libsysprof/sysprof-helpers.c
+++ b/src/libsysprof/sysprof-helpers.c
@@ -183,7 +183,7 @@ sysprof_helpers_list_processes (SysprofHelpers  *self,
       gsize len;
 
       data = g_variant_get_fixed_array (fixed_ar, &len, sizeof (gint32));
-      *processes = g_memdup (data, len * sizeof (gint32));
+      *processes = g_memdup2 (data, len * sizeof (gint32));
       *n_processes = len;
 
       return TRUE;
@@ -239,7 +239,7 @@ sysprof_helpers_list_processes_finish (SysprofHelpers  *self,
       p = g_variant_get_fixed_array (ret, &n, sizeof (gint32));
 
       if (processes != NULL)
-        *processes = g_memdup (p, n * sizeof (gint32));
+        *processes = g_memdup2 (p, n * sizeof (gint32));
 
       if (n_processes != NULL)
         *n_processes = n;