diff --git a/CHANGELOG.md b/CHANGELOG.md
index da0b412..828f261 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## 3.3.1
+  - Pin avro gem to 1.10.x, as 1.11+ requires ruby 2.6+ [#37](https://github.com/logstash-plugins/logstash-codec-avro/pull/37)
+
 ## 3.3.0
   - Add ECS support. Add target option and event.original [#36](https://github.com/logstash-plugins/logstash-codec-avro/pull/36)
 
diff --git a/logstash-codec-avro.gemspec b/logstash-codec-avro.gemspec
index 797c51a..cd333a7 100644
--- a/logstash-codec-avro.gemspec
+++ b/logstash-codec-avro.gemspec
@@ -1,7 +1,7 @@
 Gem::Specification.new do |s|
 
   s.name            = 'logstash-codec-avro'
-  s.version         = '3.3.0'
+  s.version         = '3.3.1'
   s.platform        = 'java'
   s.licenses        = ['Apache-2.0']
   s.summary         = "Reads serialized Avro records as Logstash events"
@@ -22,7 +22,7 @@ Gem::Specification.new do |s|
 
   # Gem dependencies
   s.add_runtime_dependency "logstash-core-plugin-api", ">= 1.60", "<= 2.99"
-  s.add_runtime_dependency "avro"  #(Apache 2.0 license)
+  s.add_runtime_dependency "avro", "~> 1.10.2" #(Apache 2.0 license)
   s.add_runtime_dependency 'logstash-mixin-ecs_compatibility_support', '~> 1.3'
   s.add_runtime_dependency 'logstash-mixin-event_support', '~> 1.0'
   s.add_runtime_dependency 'logstash-mixin-validator_support', '~> 1.0'