diff --git a/src/config.ts b/src/config.ts
index 91020b6..3c28819 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -77,7 +77,7 @@ addDefaults(config, {
         max: 10,
         idleTimeoutMillis: 10000,
         maxTries: 3,
-        maxActiveRequests: -1
+        maxActiveRequests: 0
     },
     postgresReadOnly: {
         enabled: false,
diff --git a/src/databases/Postgres.ts b/src/databases/Postgres.ts
index a47da54..5253ad1 100644
--- a/src/databases/Postgres.ts
+++ b/src/databases/Postgres.ts
@@ -105,7 +105,8 @@ export class Postgres implements IDatabase {
 
         Logger.debug(`prepare (postgres): type: ${type}, query: ${query}, params: ${params}`);
 
-        if (this.activePostgresRequests > this.config.postgres.maxActiveRequests) {
+        if (this.config.postgres.maxActiveRequests
+                && this.activePostgresRequests > this.config.postgres.maxActiveRequests) {
             throw new Error("Too many active postgres requests");
         }