diff --git a/templates/compiler-dev/flake.lock b/templates/compiler-dev/flake.lock
index 1c5a2c8..e8cfdd0 100644
--- a/templates/compiler-dev/flake.lock
+++ b/templates/compiler-dev/flake.lock
@@ -3,11 +3,11 @@
     "flake-compat": {
       "flake": false,
       "locked": {
-        "lastModified": 1696426674,
-        "narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
+        "lastModified": 1747046372,
+        "narHash": "sha256-CIVLLkVgvHYbgI2UpXvIIBJ12HWgX+fjA8Xf8PUmqCY=",
         "owner": "edolstra",
         "repo": "flake-compat",
-        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
+        "rev": "9100a0f413b0c601e0533d1d94ffd501ce2e7885",
         "type": "github"
       },
       "original": {
@@ -21,11 +21,11 @@
         "systems": "systems"
       },
       "locked": {
-        "lastModified": 1710146030,
-        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
         "type": "github"
       },
       "original": {
@@ -36,11 +36,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1715161350,
-        "narHash": "sha256-5ZU8DVwHO0gjw2sKoKkToYOXMJFRBpRsa17Ebm8fgj0=",
+        "lastModified": 1747958103,
+        "narHash": "sha256-qmmFCrfBwSHoWw7cVK4Aj+fns+c54EBP8cGqp/yK410=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "c4200cb341ee794775185ecd4105fbbfb5ca73a0",
+        "rev": "fe51d34885f7b5e3e7b59572796e1bcb427eccb1",
         "type": "github"
       },
       "original": {
diff --git a/templates/compiler-dev/flake.nix b/templates/compiler-dev/flake.nix
index 3d25004..7d564d3 100644
--- a/templates/compiler-dev/flake.nix
+++ b/templates/compiler-dev/flake.nix
@@ -33,7 +33,7 @@
               wasmtime
               zlib
             ]
-            ++ (with llvmPackages_18; [
+            ++ (with llvmPackages_20; [
               clang
               clang-unwrapped
               lld