diff --git a/src/calculateRank.js b/src/calculateRank.js
index a835e5dd..dc9d32ff 100644
--- a/src/calculateRank.js
+++ b/src/calculateRank.js
@@ -1,39 +1,39 @@
-function expsf(x, lambda=1.) {
+function expsf(x, lambda = 1) {
   return 2 ** (-lambda * x);
 }
 
 function calculateRank({
-  totalRepos,  // unused
+  totalRepos, // unused
   totalCommits,
-  contributions,  // unused
+  contributions, // unused
   followers,
   prs,
   issues,
   stargazers,
 }) {
-  const COMMITS_MEAN = 500, COMMITS_WEIGHT = 0.25;
-  const FOLLOWERS_MEAN = 50, FOLLOWERS_WEIGHT = 0.25;
-  const PRS_ISSUES_MEAN = 25, PRS_ISSUES_WEIGHT = 0.25;
-  const STARS_MEAN = 100, STARS_WEIGHT = 1.0;
+  const COMMITS_MEAN = 500,
+    COMMITS_WEIGHT = 0.25;
+  const FOLLOWERS_MEAN = 50,
+    FOLLOWERS_WEIGHT = 0.25;
+  const PRS_ISSUES_MEAN = 25,
+    PRS_ISSUES_WEIGHT = 0.25;
+  const STARS_MEAN = 100,
+    STARS_WEIGHT = 1.0;
 
-  const TOTAL_WEIGHT = (
-    COMMITS_WEIGHT +
-    FOLLOWERS_WEIGHT +
-    PRS_ISSUES_WEIGHT +
-    STARS_WEIGHT
-  );
+  const TOTAL_WEIGHT =
+    COMMITS_WEIGHT + FOLLOWERS_WEIGHT + PRS_ISSUES_WEIGHT + STARS_WEIGHT;
 
-  const rank = (
-    COMMITS_WEIGHT * expsf(totalCommits, 1 / COMMITS_MEAN) +
-    FOLLOWERS_WEIGHT * expsf(followers, 1 / FOLLOWERS_MEAN) +
-    PRS_ISSUES_WEIGHT * expsf(prs + issues, 1 / PRS_ISSUES_MEAN) +
-    STARS_WEIGHT * expsf(stargazers, 1 / STARS_MEAN)
-  ) / TOTAL_WEIGHT;
+  const rank =
+    (COMMITS_WEIGHT * expsf(totalCommits, 1 / COMMITS_MEAN) +
+      FOLLOWERS_WEIGHT * expsf(followers, 1 / FOLLOWERS_MEAN) +
+      PRS_ISSUES_WEIGHT * expsf(prs + issues, 1 / PRS_ISSUES_MEAN) +
+      STARS_WEIGHT * expsf(stargazers, 1 / STARS_MEAN)) /
+    TOTAL_WEIGHT;
 
   const RANK_S_PLUS = 0.025;
   const RANK_S = 0.1;
   const RANK_A_PLUS = 0.25;
-  const RANK_A = 0.50;
+  const RANK_A = 0.5;
   const RANK_B_PLUS = 0.75;
 
   const level = (() => {
@@ -45,7 +45,7 @@ function calculateRank({
     return "B";
   })();
 
-  return {level, score: rank * 100};
+  return { level, score: rank * 100 };
 }
 
 module.exports = calculateRank;
diff --git a/tests/calculateRank.test.js b/tests/calculateRank.test.js
index c114702c..5c9c4247 100644
--- a/tests/calculateRank.test.js
+++ b/tests/calculateRank.test.js
@@ -13,7 +13,7 @@ describe("Test calculateRank", () => {
         issues: 0,
         stargazers: 0,
       }),
-    ).toStrictEqual({level: "B", score: 100.});
+    ).toStrictEqual({ level: "B", score: 100 });
   });
 
   it("average user gets A rank", () => {
@@ -27,7 +27,7 @@ describe("Test calculateRank", () => {
         issues: 13,
         stargazers: 100,
       }),
-    ).toStrictEqual({level: "A", score: 50.});
+    ).toStrictEqual({ level: "A", score: 50 });
   });
 
   it("Linus Torvalds gets S+ rank", () => {
@@ -41,6 +41,6 @@ describe("Test calculateRank", () => {
         issues: 2,
         stargazers: 109100,
       }),
-    ).toStrictEqual({level: "S+", score: 1.8875322153011722});
+    ).toStrictEqual({ level: "S+", score: 1.8875322153011722 });
   });
 });