diff --git a/.travis.yml b/.travis.yml
index 65d8576..eaf1909 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -74,12 +74,6 @@ matrix:
       env:
         - CXX_COMPILER=clang++ CC_COMPILER=clang
 
-  allow_failures: # gcc-9 yeat unstable.
-    - os: linux
-      compiler: g++
-      env:
-        - CXX_COMPILER=g++-9 CC_COMPILER=gcc-9
-
 install:
   - export CC=${CC_COMPILER}
   - export CXX=${CXX_COMPILER}