diff --git a/repo2docker/buildpacks/conda/environment.frozen.yml b/repo2docker/buildpacks/conda/environment.frozen.yml
index ec1e2f13..2864475d 100644
--- a/repo2docker/buildpacks/conda/environment.frozen.yml
+++ b/repo2docker/buildpacks/conda/environment.frozen.yml
@@ -1,5 +1,5 @@
 # AUTO GENERATED FROM environment.py-3.7.yml, DO NOT MANUALLY MODIFY
-# Frozen on 2019-04-24 18:01:25 UTC
+# Frozen on 2019-04-26 14:12:19 UTC
 name: r2d
 channels:
   - conda-forge
@@ -16,7 +16,7 @@ dependencies:
   - defusedxml=0.5.0=py_1
   - entrypoints=0.3=py37_1000
   - ipykernel=5.1.0=py37h24bf2e0_1002
-  - ipython=7.4.0=py37h24bf2e0_0
+  - ipython=7.5.0=py37h24bf2e0_0
   - ipython_genutils=0.2.0=py_1
   - ipywidgets=7.4.2=py_0
   - jedi=0.13.3=py37_0
@@ -47,7 +47,7 @@ dependencies:
   - prompt_toolkit=2.0.9=py_0
   - ptyprocess=0.6.0=py_1001
   - pygments=2.3.1=py_0
-  - pyrsistent=0.14.11=py37h14c3975_0
+  - pyrsistent=0.15.1=py37h516909a_0
   - python=3.7.3=h5b0a415_0
   - python-dateutil=2.8.0=py_0
   - pyzmq=18.0.1=py37hc4ba49a_1
diff --git a/repo2docker/buildpacks/conda/environment.py-2.7.frozen.yml b/repo2docker/buildpacks/conda/environment.py-2.7.frozen.yml
index c12efcee..78906321 100644
--- a/repo2docker/buildpacks/conda/environment.py-2.7.frozen.yml
+++ b/repo2docker/buildpacks/conda/environment.py-2.7.frozen.yml
@@ -1,5 +1,5 @@
 # AUTO GENERATED FROM environment.py-2.7.yml, DO NOT MANUALLY MODIFY
-# Frozen on 2019-04-24 17:58:08 UTC
+# Frozen on 2019-04-26 14:09:19 UTC
 name: r2d
 channels:
   - conda-forge
diff --git a/repo2docker/buildpacks/conda/environment.py-3.6.frozen.yml b/repo2docker/buildpacks/conda/environment.py-3.6.frozen.yml
index e749cad5..c51bb836 100644
--- a/repo2docker/buildpacks/conda/environment.py-3.6.frozen.yml
+++ b/repo2docker/buildpacks/conda/environment.py-3.6.frozen.yml
@@ -1,5 +1,5 @@
 # AUTO GENERATED FROM environment.py-3.6.yml, DO NOT MANUALLY MODIFY
-# Frozen on 2019-04-24 17:59:15 UTC
+# Frozen on 2019-04-26 14:10:28 UTC
 name: r2d
 channels:
   - conda-forge
@@ -15,7 +15,7 @@ dependencies:
   - defusedxml=0.5.0=py_1
   - entrypoints=0.3=py36_1000
   - ipykernel=5.1.0=py36h24bf2e0_1002
-  - ipython=7.4.0=py36h24bf2e0_0
+  - ipython=7.5.0=py36h24bf2e0_0
   - ipython_genutils=0.2.0=py_1
   - ipywidgets=7.4.2=py_0
   - jedi=0.13.3=py36_0
@@ -46,7 +46,7 @@ dependencies:
   - prompt_toolkit=2.0.9=py_0
   - ptyprocess=0.6.0=py_1001
   - pygments=2.3.1=py_0
-  - pyrsistent=0.14.11=py36h14c3975_0
+  - pyrsistent=0.15.1=py36h516909a_0
   - python=3.6.7=h381d211_1004
   - python-dateutil=2.8.0=py_0
   - pyzmq=18.0.1=py36hc4ba49a_1
diff --git a/repo2docker/buildpacks/conda/environment.py-3.6.yml b/repo2docker/buildpacks/conda/environment.py-3.6.yml
index 5aef274a..f6aa14b9 100644
--- a/repo2docker/buildpacks/conda/environment.py-3.6.yml
+++ b/repo2docker/buildpacks/conda/environment.py-3.6.yml
@@ -1,5 +1,5 @@
 # AUTO GENERATED FROM environment.yml, DO NOT MANUALLY MODIFY
-# Generated on 2019-04-24 17:59:15 UTC
+# Generated on 2019-04-26 14:10:28 UTC
 dependencies:
 - python=3.6.*
 - ipywidgets==7.4.2
diff --git a/repo2docker/buildpacks/conda/environment.py-3.7.frozen.yml b/repo2docker/buildpacks/conda/environment.py-3.7.frozen.yml
index ec1e2f13..2864475d 100644
--- a/repo2docker/buildpacks/conda/environment.py-3.7.frozen.yml
+++ b/repo2docker/buildpacks/conda/environment.py-3.7.frozen.yml
@@ -1,5 +1,5 @@
 # AUTO GENERATED FROM environment.py-3.7.yml, DO NOT MANUALLY MODIFY
-# Frozen on 2019-04-24 18:01:25 UTC
+# Frozen on 2019-04-26 14:12:19 UTC
 name: r2d
 channels:
   - conda-forge
@@ -16,7 +16,7 @@ dependencies:
   - defusedxml=0.5.0=py_1
   - entrypoints=0.3=py37_1000
   - ipykernel=5.1.0=py37h24bf2e0_1002
-  - ipython=7.4.0=py37h24bf2e0_0
+  - ipython=7.5.0=py37h24bf2e0_0
   - ipython_genutils=0.2.0=py_1
   - ipywidgets=7.4.2=py_0
   - jedi=0.13.3=py37_0
@@ -47,7 +47,7 @@ dependencies:
   - prompt_toolkit=2.0.9=py_0
   - ptyprocess=0.6.0=py_1001
   - pygments=2.3.1=py_0
-  - pyrsistent=0.14.11=py37h14c3975_0
+  - pyrsistent=0.15.1=py37h516909a_0
   - python=3.7.3=h5b0a415_0
   - python-dateutil=2.8.0=py_0
   - pyzmq=18.0.1=py37hc4ba49a_1
diff --git a/repo2docker/buildpacks/conda/environment.py-3.7.yml b/repo2docker/buildpacks/conda/environment.py-3.7.yml
index 5465414c..73e5e8bf 100644
--- a/repo2docker/buildpacks/conda/environment.py-3.7.yml
+++ b/repo2docker/buildpacks/conda/environment.py-3.7.yml
@@ -1,5 +1,5 @@
 # AUTO GENERATED FROM environment.yml, DO NOT MANUALLY MODIFY
-# Generated on 2019-04-24 18:01:25 UTC
+# Generated on 2019-04-26 14:12:19 UTC
 dependencies:
 - python=3.7.*
 - ipywidgets==7.4.2