diff --git a/docker-image/v0.12/alpine-cloudwatch/Dockerfile b/docker-image/v0.12/alpine-cloudwatch/Dockerfile
index 8e063a77a..0b357f1c7 100644
--- a/docker-image/v0.12/alpine-cloudwatch/Dockerfile
+++ b/docker-image/v0.12/alpine-cloudwatch/Dockerfile
@@ -19,7 +19,7 @@ RUN set -ex \
     && gem install fluent-plugin-secure-forward \
     && gem install fluent-plugin-record-reformer \
     && gem install fluent-plugin-prometheus -v 0.4.0 \
-    && gem install fluent-plugin-splunk-hec \
+    && gem install fluent-plugin-splunk-hec -v 1.1.0 \
     && gem install aws-sdk-core -v 2.10.50 \
     && gem install fluent-plugin-cloudwatch-logs -v 0.4.5 \
     && gem install fluent-plugin-detect-exceptions -v 0.0.9 \
diff --git a/docker-image/v0.12/alpine-elasticsearch/Dockerfile b/docker-image/v0.12/alpine-elasticsearch/Dockerfile
index 52853c607..69df525ac 100644
--- a/docker-image/v0.12/alpine-elasticsearch/Dockerfile
+++ b/docker-image/v0.12/alpine-elasticsearch/Dockerfile
@@ -19,7 +19,7 @@ RUN set -ex \
     && gem install fluent-plugin-secure-forward \
     && gem install fluent-plugin-record-reformer \
     && gem install fluent-plugin-prometheus -v 0.4.0 \
-    && gem install fluent-plugin-splunk-hec \
+    && gem install fluent-plugin-splunk-hec -v 1.1.0 \
     && gem install fluent-plugin-elasticsearch \
     && gem install fluent-plugin-kubernetes_metadata_filter \
     && apk del .build-deps \
diff --git a/docker-image/v0.12/alpine-logentries/Dockerfile b/docker-image/v0.12/alpine-logentries/Dockerfile
index d139eb0a0..05f0c4e13 100644
--- a/docker-image/v0.12/alpine-logentries/Dockerfile
+++ b/docker-image/v0.12/alpine-logentries/Dockerfile
@@ -19,7 +19,7 @@ RUN set -ex \
     && gem install fluent-plugin-secure-forward \
     && gem install fluent-plugin-record-reformer \
     && gem install fluent-plugin-prometheus -v 0.4.0 \
-    && gem install fluent-plugin-splunk-hec \
+    && gem install fluent-plugin-splunk-hec -v 1.1.0 \
     # && gem install fluent-plugin-logentries \
     && gem install fluent-plugin-kubernetes_metadata_filter \
     && apk del .build-deps \
diff --git a/docker-image/v0.12/alpine-loggly/Dockerfile b/docker-image/v0.12/alpine-loggly/Dockerfile
index 74bbeff3a..cf41c5ad7 100644
--- a/docker-image/v0.12/alpine-loggly/Dockerfile
+++ b/docker-image/v0.12/alpine-loggly/Dockerfile
@@ -19,7 +19,7 @@ RUN set -ex \
     && gem install fluent-plugin-secure-forward \
     && gem install fluent-plugin-record-reformer \
     && gem install fluent-plugin-prometheus -v 0.4.0 \
-    && gem install fluent-plugin-splunk-hec \
+    && gem install fluent-plugin-splunk-hec -v 1.1.0 \
     && gem install fluent-plugin-loggly \
     && gem install fluent-plugin-kubernetes_metadata_filter \
     && apk del .build-deps \
diff --git a/docker-image/v0.12/alpine-papertrail/Dockerfile b/docker-image/v0.12/alpine-papertrail/Dockerfile
index d1f086398..815ed7570 100644
--- a/docker-image/v0.12/alpine-papertrail/Dockerfile
+++ b/docker-image/v0.12/alpine-papertrail/Dockerfile
@@ -19,7 +19,7 @@ RUN set -ex \
     && gem install fluent-plugin-secure-forward \
     && gem install fluent-plugin-record-reformer \
     && gem install fluent-plugin-prometheus -v 0.4.0 \
-    && gem install fluent-plugin-splunk-hec \
+    && gem install fluent-plugin-splunk-hec -v 1.1.0 \
     && gem install fluent-plugin-papertrail -v 0.1.1 \
     && gem install fluent-plugin-kubernetes_metadata_filter \
     && apk del .build-deps \
diff --git a/docker-image/v0.12/alpine-s3/Dockerfile b/docker-image/v0.12/alpine-s3/Dockerfile
index 3b775f2cc..0a617db07 100644
--- a/docker-image/v0.12/alpine-s3/Dockerfile
+++ b/docker-image/v0.12/alpine-s3/Dockerfile
@@ -19,7 +19,7 @@ RUN set -ex \
     && gem install fluent-plugin-secure-forward \
     && gem install fluent-plugin-record-reformer \
     && gem install fluent-plugin-prometheus -v 0.4.0 \
-    && gem install fluent-plugin-splunk-hec \
+    && gem install fluent-plugin-splunk-hec -v 1.1.0 \
     && gem install fluent-plugin-s3 -v "~> 0.8" \
     && gem install fluent-plugin-kubernetes_metadata_filter \
     && apk del .build-deps \
diff --git a/docker-image/v0.12/debian-cloudwatch/Dockerfile b/docker-image/v0.12/debian-cloudwatch/Dockerfile
index 89676d6f1..bf688dced 100644
--- a/docker-image/v0.12/debian-cloudwatch/Dockerfile
+++ b/docker-image/v0.12/debian-cloudwatch/Dockerfile
@@ -20,7 +20,7 @@ RUN buildDeps="sudo make gcc g++ libc-dev ruby-dev libffi-dev" \
     && gem install fluent-plugin-secure-forward \
     && gem install fluent-plugin-record-reformer \
     && gem install fluent-plugin-prometheus -v 0.4.0 \
-    && gem install fluent-plugin-splunk-hec \
+    && gem install fluent-plugin-splunk-hec -v 1.1.0 \
     && gem install aws-sdk-core -v 2.10.50 \
     && gem install fluent-plugin-cloudwatch-logs -v 0.4.5 \
     && gem install fluent-plugin-detect-exceptions -v 0.0.9 \
diff --git a/docker-image/v0.12/debian-elasticsearch/Dockerfile b/docker-image/v0.12/debian-elasticsearch/Dockerfile
index 316f10417..2fe2cf073 100644
--- a/docker-image/v0.12/debian-elasticsearch/Dockerfile
+++ b/docker-image/v0.12/debian-elasticsearch/Dockerfile
@@ -20,7 +20,7 @@ RUN buildDeps="sudo make gcc g++ libc-dev ruby-dev libffi-dev" \
     && gem install fluent-plugin-secure-forward \
     && gem install fluent-plugin-record-reformer \
     && gem install fluent-plugin-prometheus -v 0.4.0 \
-    && gem install fluent-plugin-splunk-hec \
+    && gem install fluent-plugin-splunk-hec -v 1.1.0 \
     && gem install fluent-plugin-elasticsearch \
     && gem install fluent-plugin-kubernetes_metadata_filter \
     && gem install ffi \
diff --git a/docker-image/v0.12/debian-logentries/Dockerfile b/docker-image/v0.12/debian-logentries/Dockerfile
index 2a21a8fb5..54f99ca58 100644
--- a/docker-image/v0.12/debian-logentries/Dockerfile
+++ b/docker-image/v0.12/debian-logentries/Dockerfile
@@ -20,7 +20,7 @@ RUN buildDeps="sudo make gcc g++ libc-dev ruby-dev libffi-dev" \
     && gem install fluent-plugin-secure-forward \
     && gem install fluent-plugin-record-reformer \
     && gem install fluent-plugin-prometheus -v 0.4.0 \
-    && gem install fluent-plugin-splunk-hec \
+    && gem install fluent-plugin-splunk-hec -v 1.1.0 \
     # && gem install fluent-plugin-logentries \
     && gem install fluent-plugin-kubernetes_metadata_filter \
     && gem install ffi \
diff --git a/docker-image/v0.12/debian-loggly/Dockerfile b/docker-image/v0.12/debian-loggly/Dockerfile
index 085326bda..7428a7ab9 100644
--- a/docker-image/v0.12/debian-loggly/Dockerfile
+++ b/docker-image/v0.12/debian-loggly/Dockerfile
@@ -20,7 +20,7 @@ RUN buildDeps="sudo make gcc g++ libc-dev ruby-dev libffi-dev" \
     && gem install fluent-plugin-secure-forward \
     && gem install fluent-plugin-record-reformer \
     && gem install fluent-plugin-prometheus -v 0.4.0 \
-    && gem install fluent-plugin-splunk-hec \
+    && gem install fluent-plugin-splunk-hec -v 1.1.0 \
     && gem install fluent-plugin-loggly \
     && gem install fluent-plugin-kubernetes_metadata_filter \
     && gem install ffi \
diff --git a/docker-image/v0.12/debian-papertrail/Dockerfile b/docker-image/v0.12/debian-papertrail/Dockerfile
index 652cb3123..4dd627fb2 100644
--- a/docker-image/v0.12/debian-papertrail/Dockerfile
+++ b/docker-image/v0.12/debian-papertrail/Dockerfile
@@ -20,7 +20,7 @@ RUN buildDeps="sudo make gcc g++ libc-dev ruby-dev libffi-dev" \
     && gem install fluent-plugin-secure-forward \
     && gem install fluent-plugin-record-reformer \
     && gem install fluent-plugin-prometheus -v 0.4.0 \
-    && gem install fluent-plugin-splunk-hec \
+    && gem install fluent-plugin-splunk-hec -v 1.1.0 \
     && gem install fluent-plugin-papertrail -v 0.1.1 \
     && gem install fluent-plugin-kubernetes_metadata_filter \
     && gem install ffi \
diff --git a/docker-image/v0.12/debian-s3/Dockerfile b/docker-image/v0.12/debian-s3/Dockerfile
index 617380fd7..22090a492 100644
--- a/docker-image/v0.12/debian-s3/Dockerfile
+++ b/docker-image/v0.12/debian-s3/Dockerfile
@@ -20,7 +20,7 @@ RUN buildDeps="sudo make gcc g++ libc-dev ruby-dev libffi-dev" \
     && gem install fluent-plugin-secure-forward \
     && gem install fluent-plugin-record-reformer \
     && gem install fluent-plugin-prometheus -v 0.4.0 \
-    && gem install fluent-plugin-splunk-hec \
+    && gem install fluent-plugin-splunk-hec -v 1.1.0 \
     && gem install fluent-plugin-s3 -v "~> 0.8" \
     && gem install fluent-plugin-kubernetes_metadata_filter \
     && gem install ffi \
diff --git a/docker-image/v0.12/debian-stackdriver/Dockerfile b/docker-image/v0.12/debian-stackdriver/Dockerfile
index 3ceaa186a..1c5873235 100644
--- a/docker-image/v0.12/debian-stackdriver/Dockerfile
+++ b/docker-image/v0.12/debian-stackdriver/Dockerfile
@@ -20,7 +20,7 @@ RUN buildDeps="sudo make gcc g++ libc-dev ruby-dev libffi-dev" \
     && gem install fluent-plugin-secure-forward \
     && gem install fluent-plugin-record-reformer \
     && gem install fluent-plugin-prometheus -v 0.4.0 \
-    && gem install fluent-plugin-splunk-hec \
+    && gem install fluent-plugin-splunk-hec -v 1.1.0 \
     && gem install fluent-plugin-google-cloud \
     && gem install fluent-plugin-kubernetes_metadata_filter \
     && gem install ffi \
diff --git a/templates/Dockerfile.erb b/templates/Dockerfile.erb
index aaff7faad..a682bc5c8 100644
--- a/templates/Dockerfile.erb
+++ b/templates/Dockerfile.erb
@@ -36,7 +36,7 @@ RUN buildDeps="sudo make gcc g++ libc-dev ruby-dev libffi-dev" \
     && gem install fluent-plugin-secure-forward \
     && gem install fluent-plugin-record-reformer \
     && gem install fluent-plugin-prometheus -v 0.4.0 \
-    && gem install fluent-plugin-splunk-hec \
+    && gem install fluent-plugin-splunk-hec -v 1.1.0 \
 <% case target when "elasticsearch"%>
     && gem install fluent-plugin-elasticsearch \
 <% when "logentries"%>