diff --git a/src/github/gh-repo-list.sh b/src/github/gh-repo-list.sh
index bac9156..deb5b24 100755
--- a/src/github/gh-repo-list.sh
+++ b/src/github/gh-repo-list.sh
@@ -18,7 +18,7 @@ function list_github_repo() {
     tmp_file=$(mktemp)
     
     # Get all repositories
-    while [ "$endpoint" ]; do
+    while [[ "$endpoint" ]]; do
         repos=$(curl --proto "=https" --tlsv1.2 -sSf -L -H "Authorization: token $GITHUB_TOKEN" "$endpoint")
         echo "$repos" >> "$tmp_file"
         
diff --git a/src/gitnap/gn-init-git.sh b/src/gitnap/gn-init-git.sh
index d53c4f4..040542c 100755
--- a/src/gitnap/gn-init-git.sh
+++ b/src/gitnap/gn-init-git.sh
@@ -15,14 +15,14 @@ function initialize_git_repo() {
     git init --initial-branch=main
     
     # Check for existing README.md file
-    if [ ! -f "README.md" ]; then
+    if [[ ! -f "README.md" ]]; then
         echo "# $repo" > README.md
     fi
     
     git add README.md
     
     # Handle optional language parameter
-    if [ -n "$1" ]; then
+    if [[ -n "$1" ]]; then
         # Language name from parameter
         language="$1"
         download_gitignore "$language"
@@ -30,7 +30,7 @@ function initialize_git_repo() {
     fi
     
     # Handle optional license parameter
-    if [ -n "$2" ]; then
+    if [[ -n "$2" ]]; then
         # License type from parameter
         license="$2"
         download_license "$license"
diff --git a/src/utils/endpoints.sh b/src/utils/endpoints.sh
index 7c4609d..4dcbbe4 100755
--- a/src/utils/endpoints.sh
+++ b/src/utils/endpoints.sh
@@ -22,7 +22,7 @@ function build_bb_endpoint() {
     repo="$3"
 
     if [[ -z "$route" || -z "$owner" || -z "$repo" ]]; then
-        echo "Error: route, owner, and repository are required for Bitbucket."
+        echo "Error: route, owner, and repository are required for Bitbucket." >&2
         exit 1
     fi
 
@@ -58,7 +58,7 @@ function build_gh_endpoint() {
     repo="$3"
 
     if [[ -z "$route" || -z "$owner" || -z "$repo" ]]; then
-        echo "Error: route, owner, and repository are required for GitHub."
+        echo "Error: route, owner, and repository are required for GitHub." >&2
         exit 1
     fi
 
@@ -95,7 +95,7 @@ function build_gl_endpoint() {
     slash_encoded="%2F"
 
     if [[ -z "$route" || -z "$owner" || -z "$repo" ]]; then
-        echo "Error: route, owner, and repository are required for Gitlab."
+        echo "Error: route, owner, and repository are required for Gitlab." >&2
         exit 1
     fi