diff --git a/ci/rustup.sh b/ci/rustup.sh
index b2be2a9..a2109f3 100755
--- a/ci/rustup.sh
+++ b/ci/rustup.sh
@@ -8,9 +8,7 @@ export TRAVIS_RUST_VERSION
 for TRAVIS_RUST_VERSION in 1.8.0 stable beta nightly; do
     run="rustup run $TRAVIS_RUST_VERSION"
     if [ "$TRAVIS_RUST_VERSION" = 1.8.0 ]; then
-      # libc 0.2.34 started using #[deprecated]
       $run cargo generate-lockfile
-      $run cargo update --package libc --precise 0.2.33 || :
     fi
     $run cargo build --verbose
     $run $PWD/ci/test_full.sh