diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 2e2eb2ce..28cd4860 100755
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,6 +1,32 @@
 stages:
+  - check
   - deploy
 
+check_lib_reversion:
+  stage: check
+  except:
+    - master
+    - /^release\/v/
+  image: $CI_DOCKER_REGISTRY/esp32-ci-env
+  script:
+    - GIT_COMMIT_ID=`git log --pretty="%s" -1 | grep -o '([0-9a-f]*)' | tail -1 | cut -c 2-8`
+    - echo "GIT_COMMIT_ID is "$GIT_COMMIT_ID
+    - test $(echo -n $GIT_COMMIT_ID | wc -c) -eq 7
+    - grep $GIT_COMMIT_ID libcoexist.a
+    - grep $GIT_COMMIT_ID libcore.a
+    - grep $GIT_COMMIT_ID libespnow.a
+    - grep $GIT_COMMIT_ID libespnow.a
+    - grep $GIT_COMMIT_ID libnet80211.a
+    - grep $GIT_COMMIT_ID libpp.a
+    - grep $GIT_COMMIT_ID libsmartconfig.a
+    - grep $GIT_COMMIT_ID libwps.a
+    - grep $GIT_COMMIT_ID libwpa.a
+    - grep $GIT_COMMIT_ID libwpa2.a
+    - grep $GIT_COMMIT_ID-remote libnet80211.a
+    - test $(grep $GIT_COMMIT_ID-dirty *.a | wc -l) -eq 0
+    - test $(xtensa-esp32-elf-nm *.a | grep -w printf | wc -l) -eq 0
+    - test $(xtensa-esp32-elf-nm *.a | grep -w ets_printf | wc -l) -eq 0
+
 push_master_to_github:
   stage: deploy
   only:
diff --git a/libcoexist.a b/libcoexist.a
index 7fce37f3..d1ad88e0 100644
Binary files a/libcoexist.a and b/libcoexist.a differ
diff --git a/libcore.a b/libcore.a
index 1df5135c..b18898b6 100644
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diff --git a/libespnow.a b/libespnow.a
index 1eb2dde0..409de732 100644
Binary files a/libespnow.a and b/libespnow.a differ
diff --git a/libmesh.a b/libmesh.a
index 5bab32ad..b30ea9b0 100644
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diff --git a/libnet80211.a b/libnet80211.a
index c7678ef9..22b15547 100644
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diff --git a/libpp.a b/libpp.a
index 93b6ccfd..9f6dd3c0 100644
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diff --git a/libsmartconfig.a b/libsmartconfig.a
index 21e69e3a..57a7f13a 100644
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diff --git a/libwpa.a b/libwpa.a
index deeddde6..788e78c4 100644
Binary files a/libwpa.a and b/libwpa.a differ
diff --git a/libwpa2.a b/libwpa2.a
index 3a3c4b59..08acd379 100644
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diff --git a/libwps.a b/libwps.a
index 752a4e6e..69d8b590 100644
Binary files a/libwps.a and b/libwps.a differ