diff --git a/pkgs/by-name/py/pytrainer/package.nix b/pkgs/by-name/py/pytrainer/package.nix
index 6d9df2aae00cb..28c03760ab0df 100644
--- a/pkgs/by-name/py/pytrainer/package.nix
+++ b/pkgs/by-name/py/pytrainer/package.nix
@@ -12,7 +12,7 @@
   perl,
   sqlite,
   tzdata,
-  webkitgtk_4_0,
+  webkitgtk_4_1,
   wrapGAppsHook3,
   xvfb-run,
 }:
@@ -60,7 +60,7 @@ python.pkgs.buildPythonApplication rec {
   buildInputs = [
     sqlite
     gtk3
-    webkitgtk_4_0
+    webkitgtk_4_1
     glib-networking
     adwaita-icon-theme
     gdk-pixbuf
@@ -89,6 +89,10 @@ python.pkgs.buildPythonApplication rec {
   postPatch = ''
     substituteInPlace pytrainer/platform.py \
         --replace-fail 'sys.prefix' "\"$out\""
+
+    # https://github.com/pytrainer/pytrainer/pull/281
+    substituteInPlace pytrainer/extensions/mapviewer.py \
+        --replace-fail "gi.require_version('WebKit2', '4.0')" "gi.require_version('WebKit2', '4.1')"
   '';
 
   checkPhase = ''