diff --git a/recipes/arvados-cwl-runner/meta.yaml b/recipes/arvados-cwl-runner/meta.yaml
index 440e4d442b3c7..506223412427e 100644
--- a/recipes/arvados-cwl-runner/meta.yaml
+++ b/recipes/arvados-cwl-runner/meta.yaml
@@ -1,19 +1,20 @@
-{% set version="1.3.0.20181218191458" %}
+{% set version="1.3.0.20190206223817" %}
 package:
   name: arvados-cwl-runner
   version: {{ version }}
 
 source:
   url: https://pypi.io/packages/source/a/arvados-cwl-runner/arvados-cwl-runner-{{ version }}.tar.gz
-  sha256: f7fdb3a357ccac03e5a55fc99290f7f2297eaaac6a91e35b8fb0270ef9de3767
+  sha256: f0ac46a4d43a6fe62950a64a4c23b92392dd6a1a4b68c27dffdb2f20b602caf3
 
 build:
+  noarch: python
   number: 0
-  skip: True # [osx or not py27]
 
 requirements:
   host:
-    - python
+    # arvados-python-client not yet buildable for 3.7
+    - python <3.7
     - setuptools
     - ruamel.yaml >=0.15.54
     - cwltool >=1.0.20181217162649
@@ -21,7 +22,7 @@ requirements:
     - arvados-python-client >=1.2.1.20181130020805
 
   run:
-    - python
+    - python <3.7
     - ruamel.yaml >=0.15.54
     - cwltool >=1.0.20181217162649
     - schema-salad >=3.0.20181129082112
diff --git a/recipes/arvados-python-client/meta.yaml b/recipes/arvados-python-client/meta.yaml
index e652fbaa357d6..65f19012076af 100644
--- a/recipes/arvados-python-client/meta.yaml
+++ b/recipes/arvados-python-client/meta.yaml
@@ -1,4 +1,4 @@
-{% set version="1.3.0.20181130020805" %}
+{% set version="1.3.0.20190205182514" %}
 
 package:
   name: arvados-python-client
@@ -6,15 +6,16 @@ package:
 
 source:
   url: https://pypi.io/packages/source/a/arvados-python-client/arvados-python-client-{{ version }}.tar.gz
-  sha256: a6ed50d638e4a3b0da78f57b0ada0532655704c89cec2bd2248a1809260f3aa2
+  sha256: 0b81ee65973087e99a2aa8ac07aeea50877987faac6bdb254cc110bff9d74cff
 
 build:
   number: 0
-  skip: True # [osx or not py27]
+  noarch: python
 
 requirements:
   host:
-    - python
+    # Supported ciso8601 versions do not have python 3.7 builds
+    - python <3.7
     - setuptools
     - ciso8601 >=1.0.6,<2.0.0
     - future
@@ -23,10 +24,10 @@ requirements:
     - pycurl >=7.19.5.1
     - ruamel.yaml >=0.15.54
     - ws4py >=0.4.2
-    - subprocess32
+    - subprocess32  # [py2k]
 
   run:
-    - python
+    - python <3.7
     - setuptools
     - ciso8601 >=1.0.6,<2.0.0
     - future
@@ -35,7 +36,7 @@ requirements:
     - pycurl >=7.19.5.1
     - ruamel.yaml >=0.15.54
     - ws4py >=0.4.2
-    - subprocess32
+    - subprocess32  # [py2k]
 
 test:
   imports: