diff --git a/.travis.yml b/.travis.yml
index 498fa2b..a75cc25 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -41,12 +41,12 @@
 
 install:
   - wget https://download.01.org/tpm2/ibmtpm974.tar.gz
-  - sha256sum ibmtpm974.tar.gz | grep -q ^8e45d86129a0adb95fee4cee51f4b1e5b2d81ed3e55af875df53f98f39eb7ad7
+  - sha256sum ibmtpm974.tar.gz | grep -q ^8e45d86129a0adb95fee4cee51f4b1e5b2d81ed3e55af875df53f98f39eb7ad7 || travis_terminate 1
   - mkdir ibmtpm
   - tar axf ibmtpm974.tar.gz -C ibmtpm
   - make -C ibmtpm/src -j$(nproc)
   - wget https://download.01.org/tpm2/cmocka-1.1.1.tar.xz
-  - sha256sum cmocka-1.1.1.tar.xz | grep -q f02ef48a7039aa77191d525c5b1aee3f13286b77a13615d11bc1148753fc0389
+  - sha256sum cmocka-1.1.1.tar.xz | grep -q f02ef48a7039aa77191d525c5b1aee3f13286b77a13615d11bc1148753fc0389 || travis_terminate 1
   - tar -Jxvf cmocka-1.1.1.tar.xz
   - mkdir cmocka
   - cd cmocka-1.1.1
@@ -57,7 +57,7 @@
   - make install
   - cd ../../
   - wget https://download.01.org/tpm2/autoconf-archive-2017.09.28.tar.xz
-  - sha256sum autoconf-archive-2017.09.28.tar.xz | grep -q 5c9fb5845b38b28982a3ef12836f76b35f46799ef4a2e46b48e2bd3c6182fa01
+  - sha256sum autoconf-archive-2017.09.28.tar.xz | grep -q 5c9fb5845b38b28982a3ef12836f76b35f46799ef4a2e46b48e2bd3c6182fa01 || travis_terminate 1
   - tar xJf autoconf-archive-2017.09.28.tar.xz
   - cp autoconf-archive-2017.09.28/m4/ax_code_coverage.m4 m4/
   - pip install --user cpp-coveralls