diff --git a/pkgs/applications/networking/gns3/default.nix b/pkgs/applications/networking/gns3/default.nix
index 9123477bb3edb8..5c66c5a5298b44 100644
--- a/pkgs/applications/networking/gns3/default.nix
+++ b/pkgs/applications/networking/gns3/default.nix
@@ -1,7 +1,7 @@
 { callPackage, stdenv }:
 
 let
-  stableVersion = "2.1.7";
+  stableVersion = "2.1.9";
   # Currently there is no preview version.
   previewVersion = stableVersion;
   addVersion = args:
@@ -10,8 +10,8 @@ let
     in args // { inherit version branch; };
   mkGui = args: callPackage (import ./gui.nix (addVersion args)) { };
   mkServer = args: callPackage (import ./server.nix (addVersion args)) { };
-  guiSrcHash = "10zf429zjzf7v4y9r7mmkp42kh5ppmqinhvwqzb7jmsrpv2cnxj6";
-  serverSrcHash = "056swz6ygqdi37asah51v1yy0ky8q0p32vf7dxs697hd7nv78aqj";
+  guiSrcHash = "0gpif6f7zqz2n8q3pkr8xv3fdc904hq69661w8f1fna360xvksd7";
+  serverSrcHash = "1y19jzyyz0sjjxkrpgr6z10irb47v7d8khdvk5nzmgnjfxv875yx";
 in {
   guiStable = mkGui {
     stable = true;
diff --git a/pkgs/applications/networking/gns3/server.nix b/pkgs/applications/networking/gns3/server.nix
index 24050314c413b8..7717862f6a0ac9 100644
--- a/pkgs/applications/networking/gns3/server.nix
+++ b/pkgs/applications/networking/gns3/server.nix
@@ -4,6 +4,16 @@
 
 let
   pythonPackages = python3Packages;
+  async-timeout = (stdenv.lib.overrideDerivation pythonPackages.async-timeout
+    (oldAttrs:
+      rec {
+        pname = "async-timeout";
+        version = "2.0.1";
+        src = pythonPackages.fetchPypi {
+          inherit pname version;
+          sha256 = "1l3kg062m02mph6rf9rdv8r5c5n356clxa6b6mrn0i77vk9g9kq0";
+        };
+      }));
   aiohttp = (stdenv.lib.overrideDerivation pythonPackages.aiohttp
     (oldAttrs:
       rec {
@@ -13,6 +23,9 @@ let
           inherit pname version;
           sha256 = "8adda6583ba438a4c70693374e10b60168663ffa6564c5c75d3c7a9055290964";
         };
+        propagatedBuildInputs = [ async-timeout ]
+          ++ (with pythonPackages; [ attrs chardet multidict yarl ])
+          ++ stdenv.lib.optional (pythonPackages.pythonOlder "3.7") pythonPackages.idna-ssl;
       }));
   aiohttp-cors = (stdenv.lib.overrideDerivation pythonPackages.aiohttp-cors
     (oldAttrs: