diff --git a/install/system_deps.yml b/install/system_deps.yml
index 9295db22..e597ed2c 100644
--- a/install/system_deps.yml
+++ b/install/system_deps.yml
@@ -18,6 +18,7 @@ dependencies:
   - xorg-libxrender
   - mdtraj
   - pymol-open-source
+  - openmm # http://docs.openmm.org/latest/userguide/application/01_getting_started.html#installing-openmm
   - pdbfixer
 # Alternatively, can use pymol-bundle from the schrodinger channel.
 #  - pymol-bundle
diff --git a/install/system_deps_windows.yml b/install/system_deps_windows.yml
index df9fa560..65dae2b4 100644
--- a/install/system_deps_windows.yml
+++ b/install/system_deps_windows.yml
@@ -18,6 +18,8 @@ dependencies:
   - xorg-libxrender
   - mdtraj
   - pymol-open-source
+  - openmm # http://docs.openmm.org/latest/userguide/application/01_getting_started.html#installing-openmm
+  - pdbfixer
 # Alternatively, can use pymol-bundle from the schrodinger channel.
 #  - pymol-bundle
   - openbabel