diff --git a/requirements-dev.txt b/requirements-dev.txt
index 1c548a38..a5ebef84 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,5 +1,5 @@
 sphinx
-pytest==3.6.1
+pytest
 pytest-cov
 nibabel
-networkx
\ No newline at end of file
+networkx