diff --git a/IlmBase/configure.ac b/IlmBase/configure.ac
index c578909310..3fa5192c71 100644
--- a/IlmBase/configure.ac
+++ b/IlmBase/configure.ac
@@ -4,10 +4,10 @@ dnl Copyright Contributors to the OpenEXR Project.
 dnl
 
 dnl Process this file with autoconf to produce a configure script.
-AC_INIT(IlmBase, 2.4.0)
+AC_INIT(IlmBase, 2.5.0)
 
 AC_SUBST(ILMBASE_VERSION_MAJOR, 2)
-AC_SUBST(ILMBASE_VERSION_MINOR, 4)
+AC_SUBST(ILMBASE_VERSION_MINOR, 5)
 AC_SUBST(ILMBASE_VERSION_PATCH, 0)
 
 AC_SUBST(ILMBASE_VERSION, ${ILMBASE_VERSION_MAJOR}.${ILMBASE_VERSION_MINOR}.${ILMBASE_VERSION_PATCH})
diff --git a/OpenEXR/configure.ac b/OpenEXR/configure.ac
index 1590211c51..2806945fc6 100644
--- a/OpenEXR/configure.ac
+++ b/OpenEXR/configure.ac
@@ -5,11 +5,11 @@ dnl
 
 dnl Process this file with autoconf to produce a configure script.
 
-AC_INIT(OpenEXR, 2.4.0)
+AC_INIT(OpenEXR, 2.5.0)
 AC_CONFIG_MACRO_DIR([m4])
 
 AC_SUBST(OPENEXR_VERSION_MAJOR, 2)
-AC_SUBST(OPENEXR_VERSION_MINOR, 4)
+AC_SUBST(OPENEXR_VERSION_MINOR, 5)
 AC_SUBST(OPENEXR_VERSION_PATCH, 0)
 
 AC_SUBST(OPENEXR_VERSION, ${OPENEXR_VERSION_MAJOR}.${OPENEXR_VERSION_MINOR}.${OPENEXR_VERSION_PATCH})
diff --git a/OpenEXR_Viewers/configure.ac b/OpenEXR_Viewers/configure.ac
index 06912cddd9..fdbb32a798 100644
--- a/OpenEXR_Viewers/configure.ac
+++ b/OpenEXR_Viewers/configure.ac
@@ -4,8 +4,8 @@ dnl Copyright Contributors to the OpenEXR Project.
 dnl
 
 dnl Process this file with autoconf to produce a configure script.
-AC_INIT(OpenEXR_Viewers, 2.4.0)
-AC_SUBST(OPENEXR_VIEWERS_VERSION, 2.3.0)
+AC_INIT(OpenEXR_Viewers, 2.5.0)
+AC_SUBST(OPENEXR_VIEWERS_VERSION, 2.5.0)
 AC_CANONICAL_HOST
 AC_CONFIG_SRCDIR(playexr/main.cpp)
 AM_CONFIG_HEADER(config/OpenEXR_ViewersConfig.h)
diff --git a/PyIlmBase/configure.ac b/PyIlmBase/configure.ac
index c2a0065be1..5c1556f6e2 100644
--- a/PyIlmBase/configure.ac
+++ b/PyIlmBase/configure.ac
@@ -4,8 +4,8 @@ dnl Copyright Contributors to the OpenEXR Project.
 dnl
 
 dnl Process this file with autoconf to produce a configure script.
-AC_INIT(PyIlmBase, 2.4.0)
-AC_SUBST(PYILMBASE_VERSION, 2.4.0)
+AC_INIT(PyIlmBase, 2.5.0)
+AC_SUBST(PYILMBASE_VERSION, 2.5.0)
 AC_CANONICAL_HOST
 AC_CONFIG_SRCDIR(PyIex/iexmodule.cpp)
 AC_CONFIG_HEADERS([config/PyIlmBaseConfig.h])