diff --git a/build/build.yml b/build/build.yml
index 83257cc23f4876096530f95faf9abb5a93110818..5ff29b5edfe5f744733110ccc261546abb380b6a 100644
--- a/build/build.yml
+++ b/build/build.yml
@@ -1,8 +1,7 @@
 name: gluon_zh_docs
-channels:
-  - conda-forge
 dependencies:
 - python
+- libgfortran
 - jupyter
 - sphinx
 - sphinx_rtd_theme
diff --git a/environment.yml b/environment.yml
index d537e428f7cdbe2b46e9831df7c9c029966dcfb9..5b260188d0a58d3930a9fd0bf4dad56553db3bec 100644
--- a/environment.yml
+++ b/environment.yml
@@ -1,6 +1,7 @@
 name: gluon
 dependencies:
 - python
+- libgfortran
 - jupyter
 - matplotlib
 - pandas