diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## 0.4.4.0 - 2022-03-30
+
+### Added
+
+ - A field for traces in evaluation errors (`--show-trace`)
+
 ## 0.4.3.0 - 2022-03-18
 
 ### Added
diff --git a/hercules-ci-api-agent.cabal b/hercules-ci-api-agent.cabal
--- a/hercules-ci-api-agent.cabal
+++ b/hercules-ci-api-agent.cabal
@@ -1,7 +1,7 @@
 cabal-version: 1.12
 
 name:           hercules-ci-api-agent
-version:        0.4.3.0
+version:        0.4.4.0
 synopsis:       API definition for Hercules CI Agent to talk to hercules-ci.com or Hercules CI Enterprise
 category:       API, CI, Testing, DevOps, Nix
 homepage:       https://github.com/hercules-ci/hercules-ci-agent#readme
diff --git a/src/Hercules/API/Agent/Evaluate/EvaluateEvent/AttributeErrorEvent.hs b/src/Hercules/API/Agent/Evaluate/EvaluateEvent/AttributeErrorEvent.hs
--- a/src/Hercules/API/Agent/Evaluate/EvaluateEvent/AttributeErrorEvent.hs
+++ b/src/Hercules/API/Agent/Evaluate/EvaluateEvent/AttributeErrorEvent.hs
@@ -9,7 +9,8 @@
   { expressionPath :: [Text],
     errorMessage :: Text,
     errorDerivation :: Maybe Text,
-    errorType :: Maybe Text
+    errorType :: Maybe Text,
+    trace :: Maybe Text
   }
   deriving (Generic, Show, Eq, NFData)