diff --git a/configure.ac b/configure.ac
index bd9d472ba..1946e679b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,13 +1,13 @@
 # Process this file with autoconf to produce a configure script.
 
-AC_INIT([meep],[m4_esyscmd(./version.sh 1.22.0-beta)])
+AC_INIT([meep],[m4_esyscmd(./version.sh 1.22.0)])
 AC_CONFIG_SRCDIR(src/step.cpp)
 
 # Shared-library version number; indicates api compatibility, and is
 # not the same as the "public" version number.  (Don't worry about this
 # except for public releases.) Note that any change to a C++ class
 # definition (in the .hpp file) generally breaks binary compatibility.
-SHARED_VERSION_INFO="26:0:0" # CURRENT:REVISION:AGE
+SHARED_VERSION_INFO="27:0:0" # CURRENT:REVISION:AGE
 
 AM_INIT_AUTOMAKE([foreign color-tests parallel-tests silent-rules 1.11])
 AM_SILENT_RULES(yes)