diff --git a/reverse/casual-conversation/challenge.yaml b/reverse/casual-conversation/challenge.yml
similarity index 95%
rename from reverse/casual-conversation/challenge.yaml
rename to reverse/casual-conversation/challenge.yml
index 32deda4..0215e81 100644
--- a/reverse/casual-conversation/challenge.yaml
+++ b/reverse/casual-conversation/challenge.yml
@@ -6,6 +6,7 @@ description: |
   
 
 value: 500
+type: dynamic
 extra:
   initial: 500
   minimum: 100
diff --git a/reverse/software-tracer/challenge.yml b/reverse/software-tracer/challenge.yml
index b0b05e2..feefcef 100644
--- a/reverse/software-tracer/challenge.yml
+++ b/reverse/software-tracer/challenge.yml
@@ -6,6 +6,7 @@ description: |
   
 
 value: 500
+type: dynamic
 extra:
   initial: 500
   minimum: 100