diff --git a/_pages/modules.md b/_pages/modules.md
index 196b69b..ee89a6e 100644
--- a/_pages/modules.md
+++ b/_pages/modules.md
@@ -18,10 +18,10 @@ Following the links below will take you to the module details. Pay attention to
 
 - MS20-VCF
     - MS-20 clones built around the LM13700 chip
-    - :heavy_check_mark: [Simple MS20 VCF](/ms20-vcf-simple/):
+    - :heavy_check_mark: [Simple MS20 VCF](/ms20_vcf_simple/):
         - 1 LM13700 filter with a Low pass or High pass switch with CV for cutoff
         - Based on barton's version : ([link](https://www.bartonmusicalcircuits.com/synthstuff.html#analog))
-    - :heavy_check_mark: [Double MS20-VCF](/ms20-vcf-double/)
+    - :heavy_check_mark: [Double MS20-VCF](/ms20_vcf_double/)
         - 2 filters in one, each with Low pass or High pass with a possibility to bridge them and get a band pass filter with CV for cutoff
         - Based on barton's version ([link](https://www.bartonmusicalcircuits.com/synthstuff.html#analog))
 
diff --git a/_pages/ms20_vcf_double.md b/_pages/ms20_vcf_double.md
index 9458a1f..2e934df 100644
--- a/_pages/ms20_vcf_double.md
+++ b/_pages/ms20_vcf_double.md
@@ -1,5 +1,5 @@
 ---
-permalink: /ms20-vcf-double/
+permalink: /ms20_vcf_double/
 layout: single
 title: "MS20 VCF double"
 category: "Filters"
diff --git a/_pages/ms20_vcf_simple.md b/_pages/ms20_vcf_simple.md
index eeba772..8d422ae 100644
--- a/_pages/ms20_vcf_simple.md
+++ b/_pages/ms20_vcf_simple.md
@@ -1,5 +1,5 @@
 ---
-permalink: /ms20-vcf-simple/
+permalink: /ms20_vcf_simple/
 layout: single
 title: "MS20 VCF simple"
 category: "Filters"