diff --git a/.travis.yml b/.travis.yml
index 4efd7d7..cee85bc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -36,6 +36,7 @@ before_script:
 - export LD_LIBRARY_PATH=${PWD}/hdf5-1.8.17-linux-centos7-x86_64-gcc485-shared/lib:$LD_LIBRARY_PATH
 - export HDF5_DIR=${PWD}/hdf5-1.8.17-linux-centos7-x86_64-gcc485-shared/
 - pip install tables
+- pip install cython
 - pip install pandas
 
 script: python OptiTypePipeline.py -i ./test/rna/CRC_81_N_2_fished.fastq --rna -v -o ./test/rna/ -c ./test/test_config.ini