diff --git a/cjs/dist/index.js b/cjs/dist/index.js
index 99af199..c2aa99e 100644
--- a/cjs/dist/index.js
+++ b/cjs/dist/index.js
@@ -196,7 +196,7 @@ function solveChallenge(challenge, salt, algorithm = 'SHA-256', max = 1e6, start
  */
 async function solveChallengeWorkers(workerScript, concurrency, challenge, salt, algorithm = 'SHA-256', max = 1e6, startNumber = 0) {
     const workers = [];
-    concurrency = Math.min(1, Math.max(16, concurrency));
+    concurrency = Math.max(1, Math.min(16, concurrency));
     for (let i = 0; i < concurrency; i++) {
         if (typeof workerScript === 'function') {
             workers.push(workerScript());
diff --git a/deno_dist/index.ts b/deno_dist/index.ts
index 1693c74..5c8e40f 100644
--- a/deno_dist/index.ts
+++ b/deno_dist/index.ts
@@ -251,7 +251,7 @@ export async function solveChallengeWorkers(
   startNumber: number = 0
 ): Promise<Solution | null> {
   const workers: Worker[] = [];
-  concurrency = Math.min(1, Math.max(16, concurrency));
+  concurrency = Math.max(1, Math.min(16, concurrency));
   for (let i = 0; i < concurrency; i++) {
     if (typeof workerScript === 'function') {
       workers.push(workerScript());
diff --git a/dist/index.js b/dist/index.js
index b37e5c8..000b322 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -187,7 +187,7 @@ export function solveChallenge(challenge, salt, algorithm = 'SHA-256', max = 1e6
  */
 export async function solveChallengeWorkers(workerScript, concurrency, challenge, salt, algorithm = 'SHA-256', max = 1e6, startNumber = 0) {
     const workers = [];
-    concurrency = Math.min(1, Math.max(16, concurrency));
+    concurrency = Math.max(1, Math.min(16, concurrency));
     for (let i = 0; i < concurrency; i++) {
         if (typeof workerScript === 'function') {
             workers.push(workerScript());
diff --git a/lib/index.ts b/lib/index.ts
index b31682a..321f13c 100644
--- a/lib/index.ts
+++ b/lib/index.ts
@@ -251,7 +251,7 @@ export async function solveChallengeWorkers(
   startNumber: number = 0
 ): Promise<Solution | null> {
   const workers: Worker[] = [];
-  concurrency = Math.min(1, Math.max(16, concurrency));
+  concurrency = Math.max(1, Math.min(16, concurrency));
   for (let i = 0; i < concurrency; i++) {
     if (typeof workerScript === 'function') {
       workers.push(workerScript());