diff --git a/.github/workflows/autobuild.yaml b/.github/workflows/autobuild.yaml
index 3f742b5..8e9da48 100644
--- a/.github/workflows/autobuild.yaml
+++ b/.github/workflows/autobuild.yaml
@@ -176,7 +176,7 @@ jobs:
             "-DOPENSSL_NO_ASM=ON"
         - name: linux
           os: ubuntu-latest
-          container: ubuntu:18.04
+          container: ubuntu:20.04
           preinstall: >-
             apt-get update &&
             apt-get install -y ninja-build libz-dev libc-ares-dev wget clang-9
diff --git a/.github/workflows/lib_compat.h b/.github/workflows/lib_compat.h
index fc4d4a1..c5530b9 100644
--- a/.github/workflows/lib_compat.h
+++ b/.github/workflows/lib_compat.h
@@ -16,5 +16,6 @@ FORCE_SYMBOL_VERSION(expf, GLIBC_2.2.5);
 FORCE_SYMBOL_VERSION(log, GLIBC_2.2.5);
 FORCE_SYMBOL_VERSION(log2, GLIBC_2.2.5);
 FORCE_SYMBOL_VERSION(pow, GLIBC_2.2.5);
+FORCE_SYMBOL_VERSION(exp, GLIBC_2.2.5);
 
 #undef FORCE_SYMBOL_VERSION