diff --git a/src/rln_circuit.md b/src/rln_circuit.md
index 6905ee5..503d23a 100644
--- a/src/rln_circuit.md
+++ b/src/rln_circuit.md
@@ -4,7 +4,7 @@
 flowchart TB
 
     subgraph Generate Secret Key
-      random0(Random 32 bytes) --> a_0(Secret key)
+      random0(Random 32 bytes) --> a_0(Secret Key)
       random1(Random 32 bytes) --> a_0
     end