diff --git a/build/build.yml b/build/build.yml
index 3529d934201db5cce7bfd787b0956ae1aef99475..3a116aac242351548350738c6920439a69ea32a7 100644
--- a/build/build.yml
+++ b/build/build.yml
@@ -12,5 +12,5 @@ dependencies:
   - nbsphinx
   - recommonmark
   - https://github.com/mli/notedown/tarball/master
-  - mxnet-cu80=1.2.0
+  - mxnet-cu80==1.2.0
   - jieba
diff --git a/environment.yml b/environment.yml
index 66733ed3677bb3b5f0f84b90df6877309ff50cab..8e4fdcb937061f09385ecee12366971e7df66da4 100644
--- a/environment.yml
+++ b/environment.yml
@@ -6,4 +6,4 @@ dependencies:
 - pandas
 - pip:
   - requests
-  - mxnet=1.2.0
+  - mxnet==1.2.0