diff --git a/src/core.sh b/src/core.sh
index 7359f2e..e7d35a2 100644
--- a/src/core.sh
+++ b/src/core.sh
@@ -161,8 +161,11 @@ update_caddyfile_fallback() {
     # 2. Replace any site block headers explicit :443 with :4443
     sed -i 's/:443[[:space:]]*{/:4443 {/g' $is_caddyfile
     
-    # 3. Add https_port 4443 to global block if not present
-    if [[ ! $(grep "https_port 4443" $is_caddyfile) ]]; then
+    # 3. Add or update https_port 4443 in global block
+    if [[ $(grep "https_port" $is_caddyfile) ]]; then
+        # Replace existing https_port with 4443
+        sed -i 's/https_port[[:space:]]\+[0-9]\+/https_port 4443/g' $is_caddyfile
+    else
         # Find first { and insert https_port 4443 on the next line
         sed -i '0,/^[[:space:]]*{[[:space:]]*$/s//{\n  https_port 4443/' $is_caddyfile
     fi