diff --git a/certman.sh b/certman.sh
index 2ea59a1..3a41137 100755
--- a/certman.sh
+++ b/certman.sh
@@ -150,6 +150,10 @@ install_certificate() {
     # Check if certificate needs updating
     if [ "$FORCE_UPDATE" = "true" ]; then
         needs_reload=1
+    elif [ "$FULLCHAIN_PEM" = "true" ] && [ -f "$final_cert_pem" ]; then
+        if ! cmp -s "$final_cert_pem" "$temp_cert_pem"; then
+            needs_reload=1
+        fi
     elif [ -f "$final_cert" ]; then
         if ! cmp -s "$final_cert" "$temp_cert"; then
             needs_reload=1
@@ -160,22 +164,21 @@ install_certificate() {
 
     # Install new certificate and key
     if [ $needs_reload -eq 1 ]; then
-        if ! cp -f "$temp_cert" "$final_cert" || ! cp -f "$temp_key" "$final_key"; then
-            echo -e "${RED}Failed to install certificate files for $domain${NC}"
-            return 1
-        fi
-
         if [ "$FULLCHAIN_PEM" = "true" ]; then
             if ! cp -f "$temp_cert_pem" "$final_cert_pem" || ! cp -f "$temp_key_pem" "$final_key_pem"; then
                 echo -e "${RED}Failed to install PEM files for $domain${NC}"
                 return 1
             fi
+            local files=("$final_cert_pem" "$final_key_pem")
+        else
+            if ! cp -f "$temp_cert" "$final_cert" || ! cp -f "$temp_key" "$final_key"; then
+                echo -e "${RED}Failed to install certificate files for $domain${NC}"
+                return 1
+            fi
+            local files=("$final_cert" "$final_key")
         fi
 
         # Set permissions and ownership
-        local files=("$final_cert" "$final_key")
-        [ "$FULLCHAIN_PEM" = "true" ] && files+=("$final_cert_pem" "$final_key_pem")
-
         for file in "${files[@]}"; do
             if ! chown "$CERT_OWNER:$CERT_GROUP" "$file" || \
                ! chmod "$CERT_PERMISSIONS" "$file"; then