diff --git a/build/linux/flatpak/org.gimp.GIMP-nightly.json b/build/linux/flatpak/org.gimp.GIMP-nightly.json
index 8ae5e5251c..00ae937f23 100644
--- a/build/linux/flatpak/org.gimp.GIMP-nightly.json
+++ b/build/linux/flatpak/org.gimp.GIMP-nightly.json
@@ -213,8 +213,8 @@
                     "sources": [
                         {
                             "type": "archive",
-                            "url": "https://github.com/aous72/OpenJPH/archive/refs/tags/0.26.1.tar.gz",
-                            "sha256": "bb3c957e421557d8812b42bf3a468bc1182352b8465851cc21d209876146035a",
+                            "url": "https://github.com/aous72/OpenJPH/archive/refs/tags/0.26.3.tar.gz",
+                            "sha256": "29de006da7f1e8cf0cd7c3ec424cf29103e465052c00b5a5f0ccb7e1f917bb3f",
                             "x-checker-data": {
                                 "type": "anitya",
                                 "project-id": 375199,