diff --git a/getssl b/getssl
index 7f3713e..45a3a8e 100755
--- a/getssl
+++ b/getssl
@@ -184,10 +184,11 @@
 # 2017-01-30 issue #243 compatibility with bash 3.0 (2.08)
 # 2017-01-30 issue #243 additional compatibility with bash 3.0 (2.09)
 # 2017-02-18 add OCSP Must-Staple to the domain csr generation (2.10)
+# 2017-09-30 issue #423 Use HTTP 1.1 as workaround atm (2.11)
 # ----------------------------------------------------------------------------------------
 
 PROGNAME=${0##*/}
-VERSION="2.10"
+VERSION="2.11"
 
 # defaults
 ACCOUNT_KEY_LENGTH=4096
@@ -1135,7 +1136,7 @@ send_signed_request() { # Sends a request to the ACME server, signed with your p
 
   CURL_HEADER="$TEMP_DIR/curl.header"
   dp="$TEMP_DIR/curl.dump"
-  CURL="curl --silent --dump-header $CURL_HEADER "
+  CURL="curl --http1.1 --silent --dump-header $CURL_HEADER "
   if [[ ${_USE_DEBUG} -eq 1 ]]; then
     CURL="$CURL --trace-ascii $dp "
   fi