diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index ea0a7d7..b9ce080 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -32,7 +32,7 @@ jobs:
         mv UHD artifacts
 
     - name: Upload Artifacts
-      uses: actions/upload-artifact@v1
+      uses: actions/upload-artifact@v4
       with:
         name: ddnet-uhd
         path: build/artifacts
diff --git a/scripts/build.sh b/scripts/build.sh
index df6dc4e..a231b22 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/bash --posix
 
 error_code=0
 
diff --git a/scripts/build_single.sh b/scripts/build_single.sh
index 7855edc..453bf9e 100755
--- a/scripts/build_single.sh
+++ b/scripts/build_single.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/bash --posix
 
 error_code=0
 
diff --git a/scripts/check_svg_meta.sh b/scripts/check_svg_meta.sh
index 0d12135..40da00f 100755
--- a/scripts/check_svg_meta.sh
+++ b/scripts/check_svg_meta.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/bash --posix
 
 num_errors=0
 num_warnings=0