diff --git a/scripts/ci-update-coverage-badge.sh b/scripts/ci-update-coverage-badge.sh
index 4f6a608..37e814a 100755
--- a/scripts/ci-update-coverage-badge.sh
+++ b/scripts/ci-update-coverage-badge.sh
@@ -71,7 +71,17 @@ if [ "$BADGE_TYPE" = "bdd" ] || [ "$BADGE_TYPE" = "unit" ]; then
         $SED_CMD "s|https://img.shields.io/badge/${BADGE_TYPE}_Coverage-.*-.*?style=flat-square|${BADGE_URL}|" README.md
     else
         # Add new badge line after the main coverage badge
-        $SED_CMD "/coverage-.*-.*?style=flat-square/a\\n${BADGE_URL}" README.md
+        # Use a more reliable approach with temporary file for cross-platform compatibility
+        TEMP_FILE=$(mktemp)
+        awk -v new_badge="${BADGE_URL}" '
+        /coverage-.*-.*?style=flat-square/ {
+            print $0
+            print new_badge
+            next
+        }
+        {print}
+        ' README.md > "$TEMP_FILE"
+        mv "$TEMP_FILE" README.md
     fi
 else
     # For combined coverage, use the original logic
diff --git a/scripts/ci-version-bump.sh b/scripts/ci-version-bump.sh
index cbe9a46..df3960b 100755
--- a/scripts/ci-version-bump.sh
+++ b/scripts/ci-version-bump.sh
@@ -40,7 +40,19 @@ fi
 # Update swagger version regardless of bump
 source VERSION
 NEW_VERSION="$MAJOR.$MINOR.$PATCH${PRERELEASE:+-$PRERELEASE}"
-sed -i "s|// @version [0-9.]*|// @version $NEW_VERSION|" cmd/server/main.go
+
+# Cross-platform sed command
+# Detect if we're on macOS (BSD sed) or Linux (GNU sed)
+SED_CMD=""
+if [[ "$(uname)" == "Darwin" ]]; then
+    # macOS - requires empty string after -i
+    SED_CMD="sed -i ''"
+else
+    # Linux - standard GNU sed
+    SED_CMD="sed -i"
+fi
+
+$SED_CMD "s|// @version [0-9.]*|// @version $NEW_VERSION|" cmd/server/main.go
 
 # Commit version changes if bumped
 if [ "$VERSION_BUMPED" = "true" ]; then