diff --git a/src/main/java/net/snowflake/client/jdbc/SnowflakeConnectionV1.java b/src/main/java/net/snowflake/client/jdbc/SnowflakeConnectionV1.java
index 23ce7d2ef..e93a38d08 100644
--- a/src/main/java/net/snowflake/client/jdbc/SnowflakeConnectionV1.java
+++ b/src/main/java/net/snowflake/client/jdbc/SnowflakeConnectionV1.java
@@ -726,7 +726,7 @@ public String getClientInfo(String name) throws SQLException {
   @Override
   public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
     logger.trace("Array createArrayOf(String typeName, Object[] " + "elements)", false);
-    return new SfSqlArray(JDBCType.valueOf(typeName).getVendorTypeNumber(), elements);
+    return new SfSqlArray(JDBCType.valueOf(typeName.toUpperCase()).getVendorTypeNumber(), elements);
   }
 
   @Override
diff --git a/src/test/java/net/snowflake/client/jdbc/SnowflakeConnectionV1Test.java b/src/test/java/net/snowflake/client/jdbc/SnowflakeConnectionV1Test.java
index de6c4fb70..899cc79e3 100644
--- a/src/test/java/net/snowflake/client/jdbc/SnowflakeConnectionV1Test.java
+++ b/src/test/java/net/snowflake/client/jdbc/SnowflakeConnectionV1Test.java
@@ -3,9 +3,16 @@
 import static net.snowflake.client.jdbc.DefaultSFConnectionHandler.mergeProperties;
 import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.MatcherAssert.assertThat;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
 
+import java.sql.Array;
+import java.sql.JDBCType;
+import java.sql.SQLException;
+import java.util.ArrayList;
 import java.util.Map;
 import java.util.Properties;
+import net.snowflake.client.core.SFBaseSession;
 import org.junit.jupiter.api.Test;
 
 /** Created by hyu on 2/2/18. */
@@ -198,4 +205,19 @@ public void testMergeProperties() {
     assertThat(result.get("PROP1"), is("value1|value2"));
     assertThat(result.get("PROP2"), is("carrot^"));
   }
+
+  @Test
+  public void testCreateArrayOfIsCaseInsensitive() throws SQLException {
+    SFConnectionHandler mockConnectionHandler = mock(SFConnectionHandler.class);
+    SFBaseSession sfBaseSession = mock(SFBaseSession.class);
+    when(mockConnectionHandler.getSFSession()).thenReturn(sfBaseSession);
+    when(sfBaseSession.checkProperties()).thenReturn(new ArrayList<>());
+    try (SnowflakeConnectionV1 connectionV1 = new SnowflakeConnectionV1(mockConnectionHandler)) {
+      Array arrayLowerCase = connectionV1.createArrayOf("integer", new Integer[] {1, 2, 3});
+      Array arrayUpperCase = connectionV1.createArrayOf("VARCHAR", new String[] {"one", "two"});
+
+      assertThat(arrayLowerCase.getBaseTypeName(), is(JDBCType.INTEGER.getName()));
+      assertThat(arrayUpperCase.getBaseTypeName(), is(JDBCType.VARCHAR.getName()));
+    }
+  }
 }