diff --git a/.travis.yml b/.travis.yml
index 179a82f..51e53c2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -21,7 +21,9 @@ matrix:
     os: windows
 
 script:
-  - cargo generate-lockfile --verbose && cargo update -p cc --precise "1.0.41" --verbose
+  - if [ "$TRAVIS_RUST_VERSION" == "1.22.0" ]; then 
+    cargo generate-lockfile --verbose && cargo update -p cc --precise "1.0.41" --verbose;
+    fi
   - cargo build --verbose --no-default-features
   - cargo build --verbose --no-default-features --features="serde"
   - cargo build --verbose --no-default-features --features="lowmemory"