relax more deps for py38
@@ -18,6 +18,6 @@ fsspec>=0.7.4 ; python_version >= '3.4'
aiohttp>=3.6.2 ; python_version >= '3.5.3'
s3fs>=0.2.2 ; python_version >= '3.4'
# packages bellow need complex local setup
-psycopg2==2.8.3
-bcolz==1.2.1
-tables==3.5.2
+psycopg2<=2.8.6,>=2.8.3
+bcolz<=1.16.4,>=1.2.1
+tables<=3.6.1,>=3.5.2
