diff --git a/.github/actions/opensearch/run.sh b/.github/actions/opensearch/run.sh
index ee41c1f..081a318 100755
--- a/.github/actions/opensearch/run.sh
+++ b/.github/actions/opensearch/run.sh
@@ -32,6 +32,7 @@ do
     --env "ES_JAVA_OPTS=-Xms1g -Xmx1g" \
     --env "http.port=${port}" \
     --env "action.destructive_requires_name=false" \
+    --env "OPENSEARCH_INITIAL_ADMIN_PASSWORD=myStrongPassword123!" \
     --env "plugins.security.disabled=${DISABLE_SECURITY}" \
     --ulimit nofile=65536:65536 \
     --ulimit memlock=-1:-1 \
@@ -55,6 +56,19 @@ if [[ $DISABLE_SECURITY = true ]]; then
     --silent \
     http://os1:$PORT
 else
+  # Starting in 2.12.0, security demo configuration script requires an initial admin password which is set to
+  # myStrongPassword123!
+  OPENSEARCH_REQUIRED_VERSION="2.12.0"
+  if [ "$CLUSTER_VERSION" == "latest" ]; then
+    CREDENTIAL="admin:myStrongPassword123!"
+  else
+    COMPARE_VERSION=$(echo $OPENSEARCH_REQUIRED_VERSION $CLUSTER_VERSION | tr ' ' '\n' | sort -V | uniq | head -n 1)
+    if [ "$COMPARE_VERSION" != "$OPENSEARCH_REQUIRED_VERSION" ]; then
+      CREDENTIAL="admin:admin"
+    else
+      CREDENTIAL="admin:myStrongPassword123!"
+    fi
+  fi
   docker run \
     --network cluster \
     --rm \
@@ -66,7 +80,7 @@ else
     --show-error \
     --silent \
     --insecure \
-    https://admin:admin@os1:$PORT
+    https://$CREDENTIAL@os1:$PORT
 fi
 
 sleep 10
diff --git a/.github/workflows/links.yml b/.github/workflows/links.yml
index a0b69a8..0a412b6 100644
--- a/.github/workflows/links.yml
+++ b/.github/workflows/links.yml
@@ -16,7 +16,7 @@ jobs:
       - uses: actions/checkout@v2
       - name: lychee Link Checker
         id: lychee
-        uses: lycheeverse/lychee-action@v1.0.8
+        uses: lycheeverse/lychee-action@v1.9.0
         with:
           args: --accept=200,403,429  "**/*.html" "**/*.md" "**/*.txt" "**/*.json" --exclude "https://github.com/\[your*" --exclude "https://localhost:9200" --exclude "http://localhost:9200" --exclude "git://github.com/opensearch-project/*" --exclude "file:///github/workspace/*" --exclude ".*api.server.org:4430/search" --exclude ".*example.com:9200" --exclude ".*myhost:8080" --exclude ".*localhost:9200/" --exclude-mail
         env:
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index db56b52..4302692 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -13,8 +13,8 @@ on:
 jobs:
   test-opensearch:
     env:
-      TEST_OPENSEARCH_SERVER: http://localhost:9250
-      PORT: 9250
+      TEST_OPENSEARCH_SERVER: http://localhost:9200
+      PORT: 9200
     strategy:
       fail-fast: false
       matrix:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f4a99a0..e28fdc3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 ## Unreleased
 ### Added
 ### Changed
+- Made CI workflows compatible with OS 2.12 and later. ([#40](https://github.com/opensearch-project/opensearch-ruby-aws-sigv4/pull/40))
 ### Deprecated
 ### Removed
 ### Fixed