diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index e16698f2..7368ff3e 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,6 +1,29 @@
 Notable Changes in OpenSlide
 ============================
 
+Version 3.4.1, 2015-04-20
+ * New formats: Philips TIFF, Ventana TIFF
+ * Support OpenJPEG 2.1.0
+ * Improve performance of JPEG and JP2K decoding
+ * Add openslide.region[i].* properties
+ * Improve MATLAB compatibility
+ * Enable function deprecation warnings with MSVC
+ * Many portability fixes
+ * aperio: Detect OpenJPEG chroma subsampling breakage during open
+ * aperio: Fill in missing tiles with downsampled data
+ * aperio: Report MPP for slides scanned in locales with decimal comma
+ * hamamatsu: Support NDPI files > 4 GB
+ * hamamatsu: Properly detect NDPI slides produced by NDP.toolkit
+ * hamamatsu: Support VMS/VMU slides without a NoLayers key
+ * hamamatsu: Report MPP for VMS/VMU
+ * leica: Support slides with 2010/03/10 XML namespace
+ * leica: Base64-decode leica.barcode property in 2010/10/01 namespace
+ * sakura: Support slides with multiple focal planes
+ * sakura: Support slides without tile table
+ * ventana: Support slides with multiple focal planes
+ * ventana: Improve positioning of AOIs within level
+ * ventana: Fix failure to recognize macro image on some slides
+
 Version 3.4.0, 2014-01-25
  * Major internal restructuring
  * New formats: Hamamatsu NDPI, Sakura SVSLIDE, Ventana BIF (preliminary)
diff --git a/Makefile.am b/Makefile.am
index a6e02ffc..d5fba9f8 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -66,7 +66,7 @@ src_libopenslide_la_CPPFLAGS = -pedantic -D_OPENSLIDE_BUILDING_DLL \
 	$(GDKPIXBUF_CFLAGS) $(ZLIB_CFLAGS) -DG_LOG_DOMAIN=\"Openslide\" \
 	-I$(top_srcdir)/src
 
-src_libopenslide_la_LDFLAGS = -version-info 4:0:4 -no-undefined
+src_libopenslide_la_LDFLAGS = -version-info 4:1:4 -no-undefined
 
 
 pkginclude_HEADERS = \
diff --git a/configure.ac b/configure.ac
index c83bbbaa..e401ae31 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ(2.61)
-AC_INIT([OpenSlide], [3.4.0], [openslide-users@lists.andrew.cmu.edu], [openslide], [http://openslide.org])
+AC_INIT([OpenSlide], [3.4.1], [openslide-users@lists.andrew.cmu.edu], [openslide], [http://openslide.org])
 AC_CONFIG_SRCDIR([src])
 AC_CONFIG_HEADER([config.h])
 AM_INIT_AUTOMAKE([foreign subdir-objects 1.11.1 dist-xz])