diff --git a/configure.ac b/configure.ac
index e895b5329e1ca3cecbf597f6d807c2a8d9c44d66..177f07d0c4e046e079bd24d1b54d26ca58e7dcbc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 AC_PREREQ([2.64])
-AC_INIT([libaec], [0.3.2], [rosenhauer@dkrz.de])
+AC_INIT([libaec], [0.3.3], [rosenhauer@dkrz.de])
 
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_AUX_DIR([config])
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 3625f0677ad1616378d6c1d6720fb08e44ee22a0..5e9a1369f96e162f5a02675d67eebff09746243f 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,7 +1,7 @@
 SET(libaec_SRCS encode.c encode_accessors.c decode.c)
 ADD_LIBRARY(aec ${LIB_TYPE} ${libaec_SRCS})
 SET_TARGET_PROPERTIES(aec PROPERTIES
-  SOVERSION 0.0.3
+  SOVERSION 0.0.4
   )
 ADD_LIBRARY(sz ${LIB_TYPE} sz_compat.c)
 SET_TARGET_PROPERTIES(sz PROPERTIES
diff --git a/src/Makefile.am b/src/Makefile.am
index 1ee7d011ba6921ab9b69a346382a5eb8b2423b3d..6a0137923c6180732de6a52d7635e0f8018bf55f 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,7 +1,7 @@
 lib_LTLIBRARIES = libaec.la libsz.la
 libaec_la_SOURCES = encode.c encode_accessors.c decode.c \
 encode.h encode_accessors.h decode.h
-libaec_la_LDFLAGS = -version-info 0:3:0
+libaec_la_LDFLAGS = -version-info 0:4:0
 
 libsz_la_SOURCES = sz_compat.c
 libsz_la_LIBADD = libaec.la