From c7f6a1830a749875165593c6c91cc98ab5242886 Mon Sep 17 00:00:00 2001
From: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
Date: Wed, 16 Jun 2021 13:48:03 +0900
Subject: [PATCH] attempt to fix CI (#78)

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
---
 .github/workflows/main.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 6de12cf..3355d38 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -2,7 +2,7 @@ name: Main
 on: [push, pull_request]
 jobs:
   test-main:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     steps:
     - uses: actions/checkout@v2
 # host info