diff --git a/.autover/changes/9f639a1b-3cd4-41ec-9d56-d6e95cb32b14.json b/.autover/changes/9f639a1b-3cd4-41ec-9d56-d6e95cb32b14.json
new file mode 100644
index 000000000..5e6b008a8
--- /dev/null
+++ b/.autover/changes/9f639a1b-3cd4-41ec-9d56-d6e95cb32b14.json
@@ -0,0 +1,11 @@
+{
+  "Projects": [
+    {
+      "Name": "Amazon.Lambda.RuntimeSupport",
+      "Type": "Patch",
+      "ChangelogMessages": [
+        "Fix issue making HTTP header comparisons be case insensitive"
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/Libraries/src/Amazon.Lambda.RuntimeSupport/Client/RuntimeApiHeaders.cs b/Libraries/src/Amazon.Lambda.RuntimeSupport/Client/RuntimeApiHeaders.cs
index 4609a93bf..16c12f375 100644
--- a/Libraries/src/Amazon.Lambda.RuntimeSupport/Client/RuntimeApiHeaders.cs
+++ b/Libraries/src/Amazon.Lambda.RuntimeSupport/Client/RuntimeApiHeaders.cs
@@ -12,6 +12,7 @@
  * express or implied. See the License for the specific language governing
  * permissions and limitations under the License.
  */
+using System;
 using System.Collections.Generic;
 using System.Linq;
 
@@ -45,12 +46,14 @@ public RuntimeApiHeaders(Dictionary<string, IEnumerable<string>> headers)
 
         private string GetHeaderValueRequired(Dictionary<string, IEnumerable<string>> headers, string header)
         {
-            return headers[header].FirstOrDefault();
+            var headerKey = headers.Keys.FirstOrDefault(k => string.Equals(k, header, StringComparison.OrdinalIgnoreCase));
+            return headers[headerKey].FirstOrDefault();
         }
 
         private string GetHeaderValueOrNull(Dictionary<string, IEnumerable<string>> headers, string header)
         {
-            if (headers.TryGetValue(header, out var values))
+             var headerKey = headers.Keys.FirstOrDefault(k => string.Equals(k, header, StringComparison.OrdinalIgnoreCase));
+            if (headers.TryGetValue(headerKey, out var values))
             {
                 return values.FirstOrDefault();
             }
@@ -58,5 +61,4 @@ private string GetHeaderValueOrNull(Dictionary<string, IEnumerable<string>> head
             return null;
         }
     }
-
 }