diff --git a/algorithm-exercises-csharp-test/src/hackerrank/projecteuler/Euler001.Test.cs b/algorithm-exercises-csharp-test/src/hackerrank/projecteuler/Euler001.Test.cs
index 58af132..566b378 100644
--- a/algorithm-exercises-csharp-test/src/hackerrank/projecteuler/Euler001.Test.cs
+++ b/algorithm-exercises-csharp-test/src/hackerrank/projecteuler/Euler001.Test.cs
@@ -1,4 +1,4 @@
-namespace algorithm_exercises_csharp.hackerrank.prohecteuler;
+namespace algorithm_exercises_csharp.hackerrank.projecteuler;
 
 [TestClass]
 public class Euler001Test
diff --git a/algorithm-exercises-csharp-test/src/hackerrank/projecteuler/Euler002.Test.cs b/algorithm-exercises-csharp-test/src/hackerrank/projecteuler/Euler002.Test.cs
index a7ba75d..b2bc079 100644
--- a/algorithm-exercises-csharp-test/src/hackerrank/projecteuler/Euler002.Test.cs
+++ b/algorithm-exercises-csharp-test/src/hackerrank/projecteuler/Euler002.Test.cs
@@ -1,4 +1,4 @@
-namespace algorithm_exercises_csharp.hackerrank.prohecteuler;
+namespace algorithm_exercises_csharp.hackerrank.projecteuler;
 
 [TestClass]
 public class Euler002Test
diff --git a/algorithm-exercises-csharp-test/src/hackerrank/projecteuler/Euler003.Test.cs b/algorithm-exercises-csharp-test/src/hackerrank/projecteuler/Euler003.Test.cs
index 1ecc265..e71928a 100644
--- a/algorithm-exercises-csharp-test/src/hackerrank/projecteuler/Euler003.Test.cs
+++ b/algorithm-exercises-csharp-test/src/hackerrank/projecteuler/Euler003.Test.cs
@@ -3,7 +3,7 @@
 // @link [[docs/hackerrank/projecteuler/euler003-solution-notes.md]]
 
 
-namespace algorithm_exercises_csharp.hackerrank.prohecteuler;
+namespace algorithm_exercises_csharp.hackerrank.projecteuler;
 
 [TestClass]
 public class Euler003Test
diff --git a/algorithm-exercises-csharp-test/src/hackerrank/warmup/SolveMeFirst.Test.cs b/algorithm-exercises-csharp-test/src/hackerrank/warmup/SolveMeFirst.Test.cs
index 00fc686..0cf1f56 100644
--- a/algorithm-exercises-csharp-test/src/hackerrank/warmup/SolveMeFirst.Test.cs
+++ b/algorithm-exercises-csharp-test/src/hackerrank/warmup/SolveMeFirst.Test.cs
@@ -1,4 +1,4 @@
-namespace algorithm_exercises_csharp;
+namespace algorithm_exercises_csharp.hackerrank;
 
 [TestClass]
 public class SolveMeFirstTest
diff --git a/algorithm-exercises-csharp/src/hackerrank/projecteuler/Euler001.cs b/algorithm-exercises-csharp/src/hackerrank/projecteuler/Euler001.cs
index 3d5dc84..8cc18d0 100644
--- a/algorithm-exercises-csharp/src/hackerrank/projecteuler/Euler001.cs
+++ b/algorithm-exercises-csharp/src/hackerrank/projecteuler/Euler001.cs
@@ -1,6 +1,6 @@
 // @link Problem definition [[docs/hackerrank/projecteuler/euler001.md]]
 
-namespace algorithm_exercises_csharp.hackerrank.prohecteuler;
+namespace algorithm_exercises_csharp.hackerrank.projecteuler;
 
 using System.Diagnostics.CodeAnalysis;
 
diff --git a/algorithm-exercises-csharp/src/hackerrank/projecteuler/Euler002.cs b/algorithm-exercises-csharp/src/hackerrank/projecteuler/Euler002.cs
index 31d97f6..bcc9356 100644
--- a/algorithm-exercises-csharp/src/hackerrank/projecteuler/Euler002.cs
+++ b/algorithm-exercises-csharp/src/hackerrank/projecteuler/Euler002.cs
@@ -1,6 +1,6 @@
 // @link Problem definition [[docs/hackerrank/projecteuler/euler002.md]]
 
-namespace algorithm_exercises_csharp.hackerrank.prohecteuler;
+namespace algorithm_exercises_csharp.hackerrank.projecteuler;
 
 using System.Diagnostics.CodeAnalysis;
 
diff --git a/algorithm-exercises-csharp/src/hackerrank/projecteuler/Euler003.cs b/algorithm-exercises-csharp/src/hackerrank/projecteuler/Euler003.cs
index 65cc565..ea49c90 100644
--- a/algorithm-exercises-csharp/src/hackerrank/projecteuler/Euler003.cs
+++ b/algorithm-exercises-csharp/src/hackerrank/projecteuler/Euler003.cs
@@ -1,6 +1,6 @@
 // @link Problem definition [[docs/hackerrank/projecteuler/euler003.md]]
 
-namespace algorithm_exercises_csharp.hackerrank.prohecteuler;
+namespace algorithm_exercises_csharp.hackerrank.projecteuler;
 
 using System.Diagnostics.CodeAnalysis;
 
diff --git a/algorithm-exercises-csharp/src/hackerrank/warmup/SolveMeFirst.cs b/algorithm-exercises-csharp/src/hackerrank/warmup/SolveMeFirst.cs
index df48ece..d9b1ebe 100644
--- a/algorithm-exercises-csharp/src/hackerrank/warmup/SolveMeFirst.cs
+++ b/algorithm-exercises-csharp/src/hackerrank/warmup/SolveMeFirst.cs
@@ -1,6 +1,6 @@
 // @link Problem definition [[docs/hackerrank/SolveMeFirst.md]]
 
-namespace algorithm_exercises_csharp;
+namespace algorithm_exercises_csharp.hackerrank;
 
 using System.Diagnostics.CodeAnalysis;