diff --git a/.travis.yml b/.travis.yml
index 3d6f521..08e44d5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -23,7 +23,7 @@ script:
 after_success: |
   if [[ "$TRAVIS_RUST_VERSION" == stable ]]; then
     RUSTFLAGS="--cfg procmacro2_semver_exempt" cargo install cargo-tarpaulin
-    cargo tarpaulin --ciserver travis-ci --coveralls $TRAVIS_JOB_ID
+    cargo tarpaulin --ciserver travis-ci --coveralls $TRAVIS_JOB_ID --features toml
   fi
 matrix:
   allow_failures: