diff --git a/gst-libs/gst/video/video-anc.c b/gst-libs/gst/video/video-anc.c
index 4748c50913..f5aa50c70c 100644
--- a/gst-libs/gst/video/video-anc.c
+++ b/gst-libs/gst/video/video-anc.c
@@ -26,17 +26,6 @@
 #include <gst/base/gstbytereader.h>
 #include "video-anc.h"
 
-#if !GLIB_CHECK_VERSION(2, 47, 4)
-#ifdef __GNUC__
-#define G_GNUC_CHECK_VERSION(major, minor) \
-    ((__GNUC__ > (major)) || \
-     ((__GNUC__ == (major)) && \
-      (__GNUC_MINOR__ >= (minor))))
-#else
-#define G_GNUC_CHECK_VERSION(major, minor) 0
-#endif
-#endif
-
 /**
  * SECTION:gstvideoanc
  * @title: GstVideo Ancillary
diff --git a/gst-libs/gst/video/video-hdr.c b/gst-libs/gst/video/video-hdr.c
index 41c3131d1f..2f97c5d8a5 100644
--- a/gst-libs/gst/video/video-hdr.c
+++ b/gst-libs/gst/video/video-hdr.c
@@ -41,24 +41,6 @@
   (m)->max_display_mastering_luminance, \
   (m)->min_display_mastering_luminance
 
-/* g_ascii_string_to_unsigned is available since 2.54. Get rid of this wrapper
- * when we bump the version in 1.18 */
-#if !GLIB_CHECK_VERSION(2,54,0)
-#define g_ascii_string_to_unsigned video_hdr_ascii_string_to_unsigned
-static gboolean
-video_hdr_ascii_string_to_unsigned (const gchar * str, guint base, guint64 min,
-    guint64 max, guint64 * out_num, GError ** error)
-{
-  gchar *endptr = NULL;
-  *out_num = g_ascii_strtoull (str, &endptr, base);
-  if (errno)
-    return FALSE;
-  if (endptr == str)
-    return FALSE;
-  return TRUE;
-}
-#endif
-
 /**
  * gst_video_mastering_display_info_init:
  * @minfo: a #GstVideoMasteringDisplayInfo
diff --git a/meson.build b/meson.build
index 897d9ac234..876eb0ebf4 100644
--- a/meson.build
+++ b/meson.build
@@ -26,7 +26,7 @@ else
   have_objc = false
 endif
 
-glib_req = '>= 2.44.0'
+glib_req = '>= 2.56.0'
 orc_req = '>= 0.4.24'
 gst_req = '>= @0@.@1@.0'.format(gst_version_major, gst_version_minor)