diff --git a/build/flatpak/org.gimp.GIMP-dev.json b/build/flatpak/org.gimp.GIMP-dev.json
index 982937649b..c61e807580 100644
--- a/build/flatpak/org.gimp.GIMP-dev.json
+++ b/build/flatpak/org.gimp.GIMP-dev.json
@@ -33,7 +33,7 @@
             "sources": [
                 {
                     "type": "git",
-                    "url": "git://git.gnome.org/babl",
+                    "url": "https://gitlab.gnome.org/GNOME/babl.git",
                     "branch": "BABL_0_1_46",
                     "commit": "e92ced2c54250af1dddb58f76ff1678d74a30dcf"
                 }
@@ -46,7 +46,7 @@
             "sources": [
                 {
                     "type": "git",
-                    "url": "git://git.gnome.org/gegl",
+                    "url": "https://gitlab.gnome.org/GNOME/gegl.git",
                     "branch": "GEGL_0_3_34",
                     "commit": "29254dcd875d271043aba57d0e6ebc48ec63c013"
                 }
@@ -59,7 +59,7 @@
             "sources": [
                 {
                     "type": "git",
-                    "url": "git://git.gnome.org/gimp",
+                    "url": "https://gitlab.gnome.org/GNOME/gimp.git",
                     "branch": "GIMP_2_10_0_RC2",
                     "commit": "6582692ec6c8196108b2d42f6758c62076a88d13"
                 }
diff --git a/build/flatpak/org.gimp.GIMP-gtk3.json b/build/flatpak/org.gimp.GIMP-gtk3.json
index 41d347cbbe..a4d14c1c49 100644
--- a/build/flatpak/org.gimp.GIMP-gtk3.json
+++ b/build/flatpak/org.gimp.GIMP-gtk3.json
@@ -76,7 +76,7 @@
             "sources": [
                 {
                     "type": "git",
-                    "url": "git://git.gnome.org/babl",
+                    "url": "https://gitlab.gnome.org/GNOME/babl.git",
                     "branch": "master"
                 }
             ]
@@ -88,7 +88,7 @@
             "sources": [
                 {
                     "type": "git",
-                    "url": "git://git.gnome.org/gegl",
+                    "url": "https://gitlab.gnome.org/GNOME/gegl.git",
                     "branch": "master"
                 }
             ]
@@ -100,7 +100,7 @@
             "sources": [
                 {
                     "type": "git",
-                    "url": "git://git.gnome.org/gimp",
+                    "url": "https://gitlab.gnome.org/GNOME/gimp.git",
                     "branch": "gtk3-port"
                 }
             ],
diff --git a/build/flatpak/org.gimp.GIMP-nightly.json b/build/flatpak/org.gimp.GIMP-nightly.json
index 2823db03e8..f05460d4db 100644
--- a/build/flatpak/org.gimp.GIMP-nightly.json
+++ b/build/flatpak/org.gimp.GIMP-nightly.json
@@ -56,7 +56,7 @@
             "sources": [
                 {
                     "type": "git",
-                    "url": "git://git.gnome.org/babl",
+                    "url": "https://gitlab.gnome.org/GNOME/babl.git",
                     "branch": "master"
                 }
             ]
@@ -68,7 +68,7 @@
             "sources": [
                 {
                     "type": "git",
-                    "url": "git://git.gnome.org/gegl",
+                    "url": "https://gitlab.gnome.org/GNOME/gegl.git",
                     "branch": "master"
                 }
             ]
@@ -80,7 +80,7 @@
             "sources": [
                 {
                     "type": "git",
-                    "url": "git://git.gnome.org/gimp",
+                    "url": "https://gitlab.gnome.org/GNOME/gimp.git",
                     "branch": "master"
                 }
             ],