diff --git a/pkgs/servers/mobilizon/common.nix b/pkgs/servers/mobilizon/common.nix
index 15dd8337a01c..54f59210b2a6 100644
--- a/pkgs/servers/mobilizon/common.nix
+++ b/pkgs/servers/mobilizon/common.nix
@@ -2,13 +2,13 @@
 rec {
 
   pname = "mobilizon";
-  version = "5.1.5";
+  version = "5.2.0";
 
   src = fetchFromGitLab {
     domain = "framagit.org";
     owner = "kaihuri";
     repo = pname;
     tag = version;
-    hash = "sha256-nwEmW43GO0Ta7O7mUSJaEtm4hBfXInPqatBRdaWrhBU=";
+    hash = "sha256-wsiu0f0M0SMjgskMJuA/wUx6IxT7bTzHrOnxX8eFq9g=";
   };
 }
diff --git a/pkgs/servers/mobilizon/default.nix b/pkgs/servers/mobilizon/default.nix
index 2d0de84a77cf..22dc3be2c832 100644
--- a/pkgs/servers/mobilizon/default.nix
+++ b/pkgs/servers/mobilizon/default.nix
@@ -75,12 +75,12 @@ mixRelease rec {
         };
         icalendar = buildMix rec {
           name = "icalendar";
-          version = "unstable-2022-04-10";
+          version = "1.1.2";
           src = fetchFromGitHub {
-            owner = "tcitworld";
+            owner = "mobilizon-tools";
             repo = name;
-            rev = "1033d922c82a7223db0ec138e2316557b70ff49f";
-            hash = "sha256-N3bJZznNazLewHS4c2B7LP1lgxd1wev+EWVlQ7rOwfU=";
+            rev = "b8fc5360b1755f60f2768d40f6aca949ef598a00";
+            hash = "sha256-UAdlYTRt1itkR/dmC2/AM89MlJIABJw9N0XfYR6IcVI=";
           };
           beamDeps = with final; [
             mix_test_watch
diff --git a/pkgs/servers/mobilizon/frontend.nix b/pkgs/servers/mobilizon/frontend.nix
index 8a5ca34f9a1f..4feda08bda9e 100644
--- a/pkgs/servers/mobilizon/frontend.nix
+++ b/pkgs/servers/mobilizon/frontend.nix
@@ -11,7 +11,7 @@ in
 buildNpmPackage {
   inherit (common) pname version src;
 
-  npmDepsHash = "sha256-5ilhuFaIvksXsJmNu20m8MV3hYtyPUz4zp8NIvhR5Nw=";
+  npmDepsHash = "sha256-0eemOn96ciiqdNBZC+cFbcaEvZ5nkV9IndsXOzIgelQ=";
 
   nativeBuildInputs = [ imagemagick ];