diff --git a/pkgs/applications/networking/gns3/server.nix b/pkgs/applications/networking/gns3/server.nix
index 62fdfd71f235..5ba6b57d5bd7 100644
--- a/pkgs/applications/networking/gns3/server.nix
+++ b/pkgs/applications/networking/gns3/server.nix
@@ -34,10 +34,8 @@ in python.pkgs.buildPythonPackage {
   };
 
   postPatch = ''
-    # yarl 1.4+ only requires Python 3.6+
     substituteInPlace requirements.txt \
-      --replace "aiohttp==3.6.2" "aiohttp>=3.6.2" \
-      --replace "yarl==1.3.0" ""
+      --replace "aiohttp==3.6.2" "aiohttp>=3.6.2"
   '';
 
   propagatedBuildInputs = with python.pkgs; [