diff --git a/assembly/database.ts b/assembly/database.ts
index fd52489..61f3280 100644
--- a/assembly/database.ts
+++ b/assembly/database.ts
@@ -11,8 +11,8 @@ export function getStringInvoker(): StringInvoke {
     return new StringInvoke(api);
 }
 
-let invoker = getStringInvoker();
-
 export function query(request: string): string {
-    return invoker.invoke(request);
+    let stringInvoker = getStringInvoker();
+    let result = stringInvoker.invoke(request);
+    return result;
 }
diff --git a/assembly/llamadb.ts b/assembly/llamadb.ts
index fd52489..61f3280 100644
--- a/assembly/llamadb.ts
+++ b/assembly/llamadb.ts
@@ -11,8 +11,8 @@ export function getStringInvoker(): StringInvoke {
     return new StringInvoke(api);
 }
 
-let invoker = getStringInvoker();
-
 export function query(request: string): string {
-    return invoker.invoke(request);
+    let stringInvoker = getStringInvoker();
+    let result = stringInvoker.invoke(request);
+    return result;
 }
diff --git a/assembly/redis.ts b/assembly/redis.ts
index fd52489..61f3280 100644
--- a/assembly/redis.ts
+++ b/assembly/redis.ts
@@ -11,8 +11,8 @@ export function getStringInvoker(): StringInvoke {
     return new StringInvoke(api);
 }
 
-let invoker = getStringInvoker();
-
 export function query(request: string): string {
-    return invoker.invoke(request);
+    let stringInvoker = getStringInvoker();
+    let result = stringInvoker.invoke(request);
+    return result;
 }
diff --git a/assembly/sqlite.ts b/assembly/sqlite.ts
index c4bf1d6..3538a95 100644
--- a/assembly/sqlite.ts
+++ b/assembly/sqlite.ts
@@ -11,8 +11,8 @@ export function getStringInvoker(): StringInvoke {
     return new StringInvoke(api);
 }
 
-let invoker = getStringInvoker();
-
 export function query(request: string): string {
-    return invoker.invoke(request);
+    let stringInvoker = getStringInvoker();
+    let result = stringInvoker.invoke(request);
+    return result;
 }