diff --git a/pkgs/applications/networking/gns3/default.nix b/pkgs/applications/networking/gns3/default.nix
index 6dcfb27b7ba6..340cfdf879a7 100644
--- a/pkgs/applications/networking/gns3/default.nix
+++ b/pkgs/applications/networking/gns3/default.nix
@@ -1,13 +1,13 @@
 { callPackage }:
 
 let
-  stableVersion = "2.2.5";
+  stableVersion = "2.2.6";
   previewVersion = stableVersion;
   addVersion = args:
     let version = if args.stable then stableVersion else previewVersion;
         branch = if args.stable then "stable" else "preview";
     in args // { inherit version branch; };
-  extraArgs = {
+  extraArgs = rec {
     mkOverride = attrname: version: sha256:
       self: super: {
         ${attrname} = super.${attrname}.overridePythonAttrs (oldAttrs: {
@@ -18,11 +18,15 @@ let
           doCheck = oldAttrs.doCheck && (attrname != "psutil");
         });
       };
+    commonOverrides = [
+      (mkOverride "psutil" "5.6.6"
+        "1rs6z8bfy6bqzw88s4i5zllrx3i18hnkv4akvmw7bifngcgjh8dd")
+    ];
   };
   mkGui = args: callPackage (import ./gui.nix (addVersion args // extraArgs)) { };
   mkServer = args: callPackage (import ./server.nix (addVersion args // extraArgs)) { };
-  guiSrcHash = "1yxwbz93x9hn5y6dir8v7bdfsmfgppvjg4z88l8gx82hhf2476fx";
-  serverSrcHash = "1d3m8qrz82g8ii6q6j015wqwp6j0415fbqbjvw43zhdx5mnn962d";
+  guiSrcHash = "0inqy2zw5h9cgiyqb04kv8b5sjrdi4a637gdqs83k887axkd48aw";
+  serverSrcHash = "04d9lny5vyk0kbi5ilv5mngaicnxb077xpcaaqlcd9b1m3kiq19n";
 in {
   guiStable = mkGui {
     stable = true;
diff --git a/pkgs/applications/networking/gns3/gui.nix b/pkgs/applications/networking/gns3/gui.nix
index 2d462d5c11d0..2524731cd05c 100644
--- a/pkgs/applications/networking/gns3/gui.nix
+++ b/pkgs/applications/networking/gns3/gui.nix
@@ -1,12 +1,10 @@
-{ stable, branch, version, sha256Hash, mkOverride }:
+{ stable, branch, version, sha256Hash, mkOverride, commonOverrides }:
 
 { lib, stdenv, python3, fetchFromGitHub }:
 
 let
   # TODO: This package requires qt5Full to launch
-  defaultOverrides = [
-    (mkOverride "psutil" "5.6.3"
-      "1wv31zly44qj0rp2acg58xbnc7bf6ffyadasq093l455q30qafl6")
+  defaultOverrides = commonOverrides ++ [
     (mkOverride "jsonschema" "2.6.0"
       "00kf3zmpp9ya4sydffpifn0j0mzm342a2vzh82p6r0vh10cg7xbg")
   ];
@@ -40,7 +38,8 @@ in python.pkgs.buildPythonPackage rec {
       requires access to a local or remote GNS3 server (it's recommended to
       download the official GNS3 VM).
     '';
-    homepage = https://www.gns3.com/;
+    homepage = "https://www.gns3.com/";
+    changelog = "https://github.com/GNS3/gns3-gui/releases/tag/v${version}";
     license = licenses.gpl3Plus;
     platforms = platforms.linux;
     maintainers = with maintainers; [ primeos ];
diff --git a/pkgs/applications/networking/gns3/server.nix b/pkgs/applications/networking/gns3/server.nix
index beeac9d02936..32dc42e9f51a 100644
--- a/pkgs/applications/networking/gns3/server.nix
+++ b/pkgs/applications/networking/gns3/server.nix
@@ -1,11 +1,9 @@
-{ stable, branch, version, sha256Hash, mkOverride }:
+{ stable, branch, version, sha256Hash, mkOverride, commonOverrides }:
 
 { lib, stdenv, python3, fetchFromGitHub }:
 
 let
-  defaultOverrides = [
-    (mkOverride "psutil" "5.6.3"
-      "1wv31zly44qj0rp2acg58xbnc7bf6ffyadasq093l455q30qafl6")
+  defaultOverrides = commonOverrides ++ [
     (mkOverride "jsonschema" "2.6.0"
       "00kf3zmpp9ya4sydffpifn0j0mzm342a2vzh82p6r0vh10cg7xbg")
   ];
@@ -25,8 +23,6 @@ in python.pkgs.buildPythonPackage {
   };
 
   postPatch = ''
-    # Only 2.x is problematic:
-    sed -iE "s/prompt-toolkit==1.0.15/prompt-toolkit<2.0.0/" requirements.txt
     # yarl 1.4+ only requires Python 3.6+
     sed -iE "s/yarl==1.3.0//" requirements.txt
   '';
@@ -34,7 +30,7 @@ in python.pkgs.buildPythonPackage {
   propagatedBuildInputs = with python.pkgs; [
     aiohttp-cors yarl aiohttp multidict setuptools
     jinja2 psutil zipstream raven jsonschema distro async_generator aiofiles
-    (python.pkgs.callPackage ../../../development/python-modules/prompt_toolkit/1.nix {})
+    prompt_toolkit py-cpuinfo
   ];
 
   # Requires network access
@@ -51,7 +47,8 @@ in python.pkgs.buildPythonPackage {
       Qemu/KVM. Clients like the GNS3 GUI control the server using a HTTP REST
       API.
     '';
-    homepage = https://www.gns3.com/;
+    homepage = "https://www.gns3.com/";
+    changelog = "https://github.com/GNS3/gns3-server/releases/tag/v${version}";
     license = licenses.gpl3Plus;
     platforms = platforms.linux;
     maintainers = with maintainers; [ primeos ];