diff --git a/CHANGELOG.md b/CHANGELOG.md
index 47f965fbac0..baa9be6e25f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ### vNEXT
 
 - Fix: Serialize arrays as JSON on fetch in `RESTDataSource`. [PR #2219](https://github.com/apollographql/apollo-server/pull/2219)
+- Fix: The `privateHeaders` configuration for `apollo-engine-reporting` now allows headers to be specified using any case and lower-cases them prior to comparison. [PR #2276](https://github.com/apollographql/apollo-server/pull/2276)
 
 ### v2.3.3
 
diff --git a/packages/apollo-engine-reporting/src/extension.ts b/packages/apollo-engine-reporting/src/extension.ts
index 86ad82476a5..bbc31a26860 100644
--- a/packages/apollo-engine-reporting/src/extension.ts
+++ b/packages/apollo-engine-reporting/src/extension.ts
@@ -125,11 +125,14 @@ export class EngineReportingExtension<TContext = any>
       for (const [key, value] of o.request.headers) {
         if (
           this.options.privateHeaders &&
-          typeof this.options.privateHeaders === 'object' &&
+          Array.isArray(this.options.privateHeaders) &&
           // We assume that most users only have a few private headers, or will
           // just set privateHeaders to true; we can change this linear-time
           // operation if it causes real performance issues.
-          this.options.privateHeaders.includes(key.toLowerCase())
+          this.options.privateHeaders.some(privateHeader => {
+            // Headers are case-insensitive, and should be compared as such.
+            return privateHeader.toLowerCase() === key.toLowerCase();
+          })
         ) {
           continue;
         }
@@ -164,7 +167,7 @@ export class EngineReportingExtension<TContext = any>
       Object.keys(o.variables).forEach(name => {
         if (
           this.options.privateVariables &&
-          typeof this.options.privateVariables === 'object' &&
+          Array.isArray(this.options.privateVariables) &&
           // We assume that most users will have only a few private variables,
           // or will just set privateVariables to true; we can change this
           // linear-time operation if it causes real performance issues.