diff --git a/requirements-dev.txt b/requirements-dev.txt
index bd1f939e356f507e277f7f7040f5f628e80c43ee..89d713fc428b1271400fa50902a5b4161c80f8e1 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -4,4 +4,4 @@ mock==2.*
 coverage==4.*
 pytest==3.*
 pytest-cov==2.*
-pytest-runner>=2.*,<=3.*
+pytest-runner>=2,<=3
diff --git a/requirements.txt b/requirements.txt
index 51e205639f8e3e8cc298b82ee5116106b036e907..0ec1322f7bc0aa7bb5b9d25c6d3f8ba43a1cb221 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 six==1.*
-deprecation>=1.*,<=2.*
+deprecation>=1,<=2
 numpy==1.*
 scipy>=0.18,<2
 nibabel==2.*