diff --git a/src/graphql.ts b/src/graphql.ts
index bc2da58c..dfd5fa3a 100644
--- a/src/graphql.ts
+++ b/src/graphql.ts
@@ -18,6 +18,8 @@ const NON_VARIABLE_OPTIONS = [
   "mediaType",
 ];
 
+const GHES_V3_SUFFIX_REGEX = /\/api\/v3\/?$/;
+
 export function graphql<ResponseData = GraphQlQueryResponseData>(
   request: typeof Request,
   query: string | RequestParameters,
@@ -45,6 +47,13 @@ export function graphql<ResponseData = GraphQlQueryResponseData>(
     {} as GraphQlEndpointOptions
   );
 
+  // workaround for GitHub Enterprise baseUrl set with /api/v3 suffix
+  // https://github.com/octokit/auth-app.js/issues/111#issuecomment-657610451
+  const baseUrl = options.baseUrl || request.endpoint.DEFAULTS.baseUrl;
+  if (GHES_V3_SUFFIX_REGEX.test(baseUrl)) {
+    requestOptions.url = baseUrl.replace(GHES_V3_SUFFIX_REGEX, "/api/graphql");
+  }
+
   return request(requestOptions).then((response) => {
     if (response.data.errors) {
       const headers: ResponseHeaders = {};
diff --git a/test/defaults.test.ts b/test/defaults.test.ts
index 8a26e27c..d0d6cbfd 100644
--- a/test/defaults.test.ts
+++ b/test/defaults.test.ts
@@ -121,4 +121,30 @@ describe("graphql.defaults()", () => {
       expect(result).toStrictEqual(mockData);
     });
   });
+
+  it("handle baseUrl set with /api/v3 suffix", () => {
+    const ghesGraphQl = graphql.defaults({
+      baseUrl: "https://github.acme-inc.com/api/v3",
+      headers: {
+        authorization: `token secret123`,
+      },
+      request: {
+        fetch: fetchMock.sandbox().post(
+          "https://github.acme-inc.com/api/graphql",
+          { data: { ok: true } },
+          {
+            headers: {
+              authorization: "token secret123",
+            },
+          }
+        ),
+      },
+    });
+
+    return ghesGraphQl(`query {
+      viewer {
+        login
+      }
+    }`);
+  });
 });