diff --git a/1_einstein_model_solutions.md b/1_einstein_model_solutions.md
deleted file mode 100644
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..0000000000000000000000000000000000000000
diff --git a/mkdocs.yml b/mkdocs.yml
index 7f687da3f0602c1e2a833acd755231adf4091317..bc7e93a0fa81ecbded998633ebcd71bf698440cb 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -33,8 +33,8 @@ nav:
     - Extra exercises: 'extra_exercises.md'
   - Solutions:
     - Lecture 0: '1_einstein_model_solutions.md'
-    - Lecture 1: 'solutions/1_einstein_model.md'
-    - Lecture 2: 'solutions/2_debye_model.md'
+    - Lecture 1: 'solutions/1_einstein_model_sol.md'
+    - Lecture 2: 'solutions/2_debye_model_sol.md'
 
 theme:
   name: material
diff --git a/src/solutions/1_einstein_model.md b/src/solutions/1_einstein_model_sol.md
similarity index 100%
rename from src/solutions/1_einstein_model.md
rename to src/solutions/1_einstein_model_sol.md
diff --git a/src/solutions/2_debye_model.md b/src/solutions/2_debye_model_sol.md
similarity index 100%
rename from src/solutions/2_debye_model.md
rename to src/solutions/2_debye_model_sol.md