diff --git a/configure b/configure
index ece6779..6c045be 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for iperf 3-CURRENT.
+# Generated by GNU Autoconf 2.69 for iperf 3.1b1.
 #
 # Report bugs to <https://github.com/esnet/iperf>.
 #
@@ -590,8 +590,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='iperf'
 PACKAGE_TARNAME='iperf'
-PACKAGE_VERSION='3-CURRENT'
-PACKAGE_STRING='iperf 3-CURRENT'
+PACKAGE_VERSION='3.1b1'
+PACKAGE_STRING='iperf 3.1b1'
 PACKAGE_BUGREPORT='https://github.com/esnet/iperf'
 PACKAGE_URL='http://software.es.net/iperf/'
 
@@ -1316,7 +1316,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures iperf 3-CURRENT to adapt to many kinds of systems.
+\`configure' configures iperf 3.1b1 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1386,7 +1386,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of iperf 3-CURRENT:";;
+     short | recursive ) echo "Configuration of iperf 3.1b1:";;
    esac
   cat <<\_ACEOF
 
@@ -1500,7 +1500,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-iperf configure 3-CURRENT
+iperf configure 3.1b1
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -1869,7 +1869,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by iperf $as_me 3-CURRENT, which was
+It was created by iperf $as_me 3.1b1, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -2744,7 +2744,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='iperf'
- VERSION='3-CURRENT'
+ VERSION='3.1b1'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -13309,7 +13309,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by iperf $as_me 3-CURRENT, which was
+This file was extended by iperf $as_me 3.1b1, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -13376,7 +13376,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-iperf config.status 3-CURRENT
+iperf config.status 3.1b1
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"