diff --git a/client/src/main/java/com/tigrisdata/db/client/config/TigrisConfiguration.java b/client/src/main/java/com/tigrisdata/db/client/config/TigrisConfiguration.java
index 5b074be..8f585e0 100644
--- a/client/src/main/java/com/tigrisdata/db/client/config/TigrisConfiguration.java
+++ b/client/src/main/java/com/tigrisdata/db/client/config/TigrisConfiguration.java
@@ -82,7 +82,8 @@ public int hashCode() {
   /** Builder class for {@link TigrisConfiguration} */
   public static final class Builder {
 
-    private final String baseURL;
+    private static final int DEFAULT_GRPC_PORT = 443;
+    private String baseURL;
     private TigrisConfiguration.NetworkConfig network;
     private TigrisConfiguration.AuthConfig authConfig;
     private ObjectMapper objectMapper;
@@ -134,6 +135,9 @@ public Builder withAuthConfig(AuthConfig authConfig) {
     }
 
     public TigrisConfiguration build() {
+      if (!this.baseURL.contains(":")) {
+        this.baseURL = this.baseURL + ":" + DEFAULT_GRPC_PORT;
+      }
       return new TigrisConfiguration(this);
     }