diff --git a/qrexec-lib/Makefile b/qrexec-lib/Makefile
index 6bfc3e1..d7cde6c 100644
--- a/qrexec-lib/Makefile
+++ b/qrexec-lib/Makefile
@@ -1,7 +1,7 @@
 CC=gcc
 CFLAGS+=-I. -g -O2 -Wall -Wextra -Werror -pie -fPIC `pkg-config --cflags vchan-$(BACKEND_VMM)`
 COMMONIOALL=ioall.o
-SO_VER=1
+SO_VER=2
 LDFLAGS=-shared
 VCHANLIBS = `pkg-config --libs vchan-$(BACKEND_VMM)`
 
diff --git a/rpm_spec/qubes-utils.spec b/rpm_spec/qubes-utils.spec
index ab07025..e4fe8cc 100644
--- a/rpm_spec/qubes-utils.spec
+++ b/rpm_spec/qubes-utils.spec
@@ -85,8 +85,8 @@ rm -rf $RPM_BUILD_ROOT
 %{python_sitearch}/qubes/imgconverter.pyo
 
 %files libs
-%{_libdir}/libqrexec-utils.so.1
-%{_libdir}/libqubes-rpc-filecopy.so.1
+%{_libdir}/libqrexec-utils.so.2
+%{_libdir}/libqubes-rpc-filecopy.so.2
 
 %files devel
 %defattr(-,root,root,-)