diff --git a/buildutils/setup_travis.sh b/buildutils/setup_travis.sh
index 90b576c..956dcf5 100755
--- a/buildutils/setup_travis.sh
+++ b/buildutils/setup_travis.sh
@@ -2,6 +2,8 @@
 
 set -exo pipefail
 
+CAPNP_VERSION=0.5.1.2
+
 sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
 sudo apt-get -qq update
 sudo apt-get -qq install g++-4.8 libstdc++-4.8-dev
@@ -9,5 +11,5 @@ sudo update-alternatives --quiet --install /usr/bin/gcc  gcc  /usr/bin/gcc-4.8
 sudo update-alternatives --quiet --set gcc /usr/bin/gcc-4.8
 
 if ! [ -z "${BUILD_CAPNP}" ]; then
-  wget https://capnproto.org/capnproto-c++-0.5.2.tar.gz && tar xzvf capnproto-c++-0.5.2.tar.gz && cd capnproto-c++-0.5.2 && ./configure && make -j6 check && sudo make install && sudo ldconfig && cd ..
+  wget https://capnproto.org/capnproto-c++-${CAPNP_VERSION}.tar.gz && tar xzvf capnproto-c++-${CAPNP_VERSION}.tar.gz && cd capnproto-c++-${CAPNP_VERSION} && ./configure && make -j6 check && sudo make install && sudo ldconfig && cd ..
 fi