diff --git a/src/main/java/com/github/dockerjava/jaxrs/DockerCmdExecFactoryImpl.java b/src/main/java/com/github/dockerjava/jaxrs/DockerCmdExecFactoryImpl.java
index f64cf4e2b..5d489bbc5 100644
--- a/src/main/java/com/github/dockerjava/jaxrs/DockerCmdExecFactoryImpl.java
+++ b/src/main/java/com/github/dockerjava/jaxrs/DockerCmdExecFactoryImpl.java
@@ -231,7 +231,7 @@ private void configureProxy(ClientConfig clientConfig, String protocol) {
                 String hostname = address.getHostName();
                 int port = address.getPort();
 
-                clientConfig.property(ClientProperties.PROXY_URI, protocol + "://" + hostname + ":" + port);
+                clientConfig.property(ClientProperties.PROXY_URI, "http://" + hostname + ":" + port);
 
                 String httpProxyUser = System.getProperty(protocol + ".proxyUser");
                 if (httpProxyUser != null) {