diff --git a/dist/utils/sql-generator.js b/dist/utils/sql-generator.js
index 37797a8..3580f9e 100644
--- a/dist/utils/sql-generator.js
+++ b/dist/utils/sql-generator.js
@@ -216,7 +216,7 @@ export default function sqlGenerator({ tableName, genObject, dbFullName, count }
                             return null;
                         existingJoinTableNames.push(joinTableName);
                         if (joinObj.group_concat) {
-                            let group_concat = `GROUP_CONCAT(${joinTableName}.${joinObj.group_concat.field}, ${joinObj.group_concat.separator || ","}) AS ${joinObj.group_concat.alias}`;
+                            let group_concat = `GROUP_CONCAT(${joinTableName}.${joinObj.group_concat.field}, '${joinObj.group_concat.separator || ","}') AS ${joinObj.group_concat.alias}`;
                             return group_concat;
                         }
                         else if (joinObj.selectFields) {
diff --git a/package.json b/package.json
index ac63d4f..db0a143 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@moduletrace/bun-sqlite",
-    "version": "1.0.38",
+    "version": "1.0.39",
     "description": "SQLite manager for Bun",
     "author": "Benjamin Toby",
     "main": "dist/index.js",
diff --git a/src/utils/sql-generator.ts b/src/utils/sql-generator.ts
index 8568ffd..a61eaf0 100644
--- a/src/utils/sql-generator.ts
+++ b/src/utils/sql-generator.ts
@@ -313,7 +313,7 @@ export default function sqlGenerator<
                         existingJoinTableNames.push(joinTableName);
 
                         if (joinObj.group_concat) {
-                            let group_concat = `GROUP_CONCAT(${joinTableName}.${joinObj.group_concat.field}, ${joinObj.group_concat.separator || ","}) AS ${joinObj.group_concat.alias}`;
+                            let group_concat = `GROUP_CONCAT(${joinTableName}.${joinObj.group_concat.field}, '${joinObj.group_concat.separator || ","}') AS ${joinObj.group_concat.alias}`;
                             return group_concat;
                         } else if (joinObj.selectFields) {
                             return joinObj.selectFields