diff --git a/package.json b/package.json
index 86a25d1..7b716c7 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "jest-junit": "^9.0.0",
     "minimatch": "^3.0.4",
     "mustache": "^3.1.0",
-    "prettier": "^1.18.2",
+    "prettier": "^1.19.1",
     "tar-fs": "^2.0.0",
     "ts-jest": "^24.2.0",
     "typescript": "^3.7.2"
diff --git a/src/validate.ts b/src/validate.ts
index 268e816..aa862ad 100644
--- a/src/validate.ts
+++ b/src/validate.ts
@@ -71,13 +71,10 @@ export async function getValidConfig(
     .split('\n')
     .filter(Boolean)
     .map((shaRef) => shaRef.split('\t'))
-    .reduce(
-      (acc, [sha, ref]) => {
-        acc[ref] = sha;
-        return acc;
-      },
-      {} as CommitSHAMap,
-    );
+    .reduce((acc, [sha, ref]) => {
+      acc[ref] = sha;
+      return acc;
+    }, {} as CommitSHAMap);
 
   const sha = shaRefMap.HEAD;
   debug(`SHA: ${sha}`);
diff --git a/yarn.lock b/yarn.lock
index cdb9f52..d2302fe 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3274,10 +3274,10 @@ prelude-ls@~1.1.2:
   resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.1.2.tgz#21932a549f5e52ffd9a827f570e04be62a97da54"
   integrity sha1-IZMqVJ9eUv/ZqCf1cOBL5iqX2lQ=
 
-prettier@^1.18.2:
-  version "1.18.2"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.18.2.tgz#6823e7c5900017b4bd3acf46fe9ac4b4d7bda9ea"
-  integrity sha512-OeHeMc0JhFE9idD4ZdtNibzY0+TPHSpSSb9h8FqtP+YnoZZ1sl8Vc9b1sasjfymH3SonAF4QcA2+mzHPhMvIiw==
+prettier@^1.19.1:
+  version "1.19.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.19.1.tgz#f7d7f5ff8a9cd872a7be4ca142095956a60797cb"
+  integrity sha512-s7PoyDv/II1ObgQunCbB9PdLmUcBZcnWOcxDh7O0N/UwDEsHyqkW+Qh28jW+mVuCdx7gLB0BotYI1Y6uI9iyew==
 
 pretty-format@^24.9.0:
   version "24.9.0"