diff --git a/progress.md b/progress.md
index c779b41..b6832f5 100644
--- a/progress.md
+++ b/progress.md
@@ -32,8 +32,8 @@
  - [x] 4.4 Structs
  - [x] 4.5 JSON
  - [x] 4.6 Text and HTML Templates
-- [ ] Chapter 5: Functions
- - [ ] 5.1 Function Declarations
+- [x] Chapter 5: Functions
+ - [x] 5.1 Function Declarations
  - [ ] 5.2 Recursion
  - [ ] 5.3 Multiple Return Values
  - [ ] 5.4 Errors