diff --git a/cmd/main.go b/cmd/main.go
index 46f96bdf9..17701ed4c 100644
--- a/cmd/main.go
+++ b/cmd/main.go
@@ -166,7 +166,7 @@ func bindKeysToEnvAndDefault() {
 }
 
 func bindProxy() {
-	err := viper.BindEnv(params.ProxyKey, params.CxProxyEnv, params.ProxyEnv)
+	err := viper.BindEnv(params.ProxyKey, params.CxProxyEnv, params.ProxyEnv, params.ProxyLowerCaseEnv)
 	if err != nil {
 		exitIfError(err)
 	}
diff --git a/internal/params/envs.go b/internal/params/envs.go
index b08da5bfd..ef3bf06ef 100644
--- a/internal/params/envs.go
+++ b/internal/params/envs.go
@@ -7,6 +7,7 @@ const (
 	BaseURIEnv                          = "CX_BASE_URI"
 	ClientTimeoutEnv                    = "CX_TIMEOUT"
 	ProxyEnv                            = "HTTP_PROXY"
+	ProxyLowerCaseEnv                   = "http_proxy"
 	CxProxyEnv                          = "CX_HTTP_PROXY"
 	ProxyTypeEnv                        = "CX_PROXY_AUTH_TYPE"
 	ProxyDomainEnv                      = "CX_PROXY_NTLM_DOMAIN"