diff --git a/.config/dotnet-tools.json b/.config/dotnet-tools.json
index 1823ec6..fd85108 100644
--- a/.config/dotnet-tools.json
+++ b/.config/dotnet-tools.json
@@ -3,7 +3,7 @@
   "isRoot": true,
   "tools": {
     "fantomas": {
-      "version": "6.3.7",
+      "version": "6.3.9",
       "commands": [
         "fantomas"
       ]
diff --git a/nix/deps.nix b/nix/deps.nix
index 2e51d68..8265c00 100644
--- a/nix/deps.nix
+++ b/nix/deps.nix
@@ -8,8 +8,8 @@
   })
   (fetchNuGet {
     pname = "fantomas";
-    version = "6.3.7";
-    sha256 = "1z1a5bw7vwz6g8nvfgkvx66jnm4hmvn62vbyq0as60nw0jlvaidl";
+    version = "6.3.9";
+    sha256 = "1b34iiiff02bbzjv03zyna8xmrgs6y87zdvp5i5k58fcqpjw44sx";
   })
   (fetchNuGet {
     pname = "Fantomas.Core";