diff --git a/.travis.yml b/.travis.yml
index de8d5164a915afd954f57e0b856d7a29856d9715..1817c50b833e1b7531a66ac5e6510254866275b1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -113,7 +113,7 @@ install:
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo apt-get install -y libmatheval-dev libfftw3-dev gsl-bin libgsl0-dev  libboost-serialization-dev ; fi
   - if test "$PLUMED_CXX" ; then ./.travis/install.xdrfile ; fi
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
-      ./.travis/install.ccache v3.4.3 ;
+      ./.travis/install.ccache v3.5 ;
     fi
 # cppcheck:
 # I use 1.71 since 1.72 seems to report a lot of false positive