diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4446caa..5d2fa93 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,6 +6,10 @@ on:
   pull_request:
   workflow_dispatch:
 
+env:
+  oopetris_main_repo_ref: 01236ab59b27e7a8889e48c73ec0361cf2206805
+  oopetris_c_repo_ref: 76814135f854a1124918dcc0fd34d36e316c4571
+
 jobs:
   build:
     name: ${{ matrix.config.name }}
@@ -41,7 +45,7 @@ jobs:
         with:
           fetch-depth: '0'
           repository: OpenBrickProtocolFoundation/oopetris
-          ref: main
+          ref: ${{ env.oopetris_main_repo_ref }}
           path: ./oopetris
           submodules: false
 
@@ -50,7 +54,7 @@ jobs:
         with:
           fetch-depth: '0'
           repository: Totto16/oopetris_wrapper_c
-          ref: main
+          ref: ${{ env.oopetris_c_repo_ref }}
           path: ./oopetris_c_wrapper
           submodules: false
 
@@ -59,7 +63,7 @@ jobs:
         uses: TheMrMilchmann/setup-msvc-dev@v3
         with:
           arch: x64
-          toolset: 14.41
+          toolset: 14.43
 
       - name: Setup GCC (Linux)
         if: matrix.config.os == 'ubuntu'
@@ -136,7 +140,7 @@ jobs:
 
       - uses: haskell-actions/setup@v2
         with:
-          ghc-version: '9.6.6'
+          ghc-version: '9.8.4'
           enable-stack: true
           stack-version: 'latest'
 
diff --git a/app/Main.hs b/app/Main.hs
index 25814c7..f3b7a4d 100644
--- a/app/Main.hs
+++ b/app/Main.hs
@@ -6,11 +6,8 @@ import System.Environment (getArgs)
 main :: IO ()
 main = do
   args <- getArgs
-  if length args /= 1
-    then do
-      putStrLn "Usage: <file>"
-    else do
-      let file = head args
+  case args of
+    [file] -> do
       isRecFile <- isRecordingFile file
       if not isRecFile
         then do
@@ -21,3 +18,4 @@ main = do
             RecordingReturnError err -> putStrLn $ "An error occurred: " ++ err
             RecordingReturnSuccess information -> print information
           return ()
+    _ -> putStrLn "Usage: <file>"
diff --git a/oopetris-haskell-wrapper.cabal b/oopetris-haskell-wrapper.cabal
index 4da02ec..5aae16e 100644
--- a/oopetris-haskell-wrapper.cabal
+++ b/oopetris-haskell-wrapper.cabal
@@ -9,7 +9,7 @@ version:        0.1.0.0
 description:    Please see the README.md
 author:         Totto16
 maintainer:     Totto16
-copyright:      2024 Totto16
+copyright:      2024-2025 Totto16
 license:        MIT
 license-file:   LICENSE
 build-type:     Simple
diff --git a/package.yaml b/package.yaml
index 94312ff..9181368 100644
--- a/package.yaml
+++ b/package.yaml
@@ -2,7 +2,7 @@ name: oopetris-haskell-wrapper
 version: 0.1.0.0
 license: MIT
 author: "Totto16"
-copyright: "2024 Totto16"
+copyright: "2024-2025 Totto16"
 
 extra-source-files:
     - README.md
diff --git a/stack.yaml b/stack.yaml
index 811587a..93cf641 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -18,7 +18,7 @@
 # resolver: ./custom-snapshot.yaml
 # resolver: https://example.com/snapshots/2023-01-01.yaml
 resolver:
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/22/40.yaml
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/23/16.yaml
 
 # User packages to be built.
 # Various formats can be used as shown in the example below.
diff --git a/stack.yaml.lock b/stack.yaml.lock
index 1f45bdb..91a59d8 100644
--- a/stack.yaml.lock
+++ b/stack.yaml.lock
@@ -1,7 +1,7 @@
 # This file was autogenerated by Stack.
 # You should not edit this file by hand.
 # For more information, please see the documentation at:
-#   https://docs.haskellstack.org/en/stable/lock_files
+#   https://docs.haskellstack.org/en/stable/topics/lock_files
 
 packages:
 - completed:
@@ -13,8 +13,8 @@ packages:
     hackage: c-storable-deriving-0.1.3
 snapshots:
 - completed:
-    sha256: 521009bd88879b6993fab5ea5abe1ee2a539dfd8ec2dfc7c57017a8eaee1e78b
-    size: 720262
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/22/40.yaml
+    sha256: 925e1bf884fd7a1ed2bfca9a041bed96fba51be6148cfa9fc4a590e218c2e483
+    size: 683820
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/23/16.yaml
   original:
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/22/40.yaml
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/23/16.yaml