diff --git a/site.go b/site.go
index c5d5d1d..bbb31dd 100644
--- a/site.go
+++ b/site.go
@@ -13,12 +13,12 @@ import (
 
 // Site represents a site.
 type Site struct {
-	Title      string            `toml:"title"`
-	Tasks      []*Task           `toml:"tasks"`
-	Params     map[string]string `toml:"params"`
-	Permalinks map[string]string `toml:"permalinks"`
-	Generated  time.Time         `toml:"-"`
-	Root       *Page             `toml:"-"`
+	Title      string                 `toml:"title"`
+	Tasks      []*Task                `toml:"tasks"`
+	Params     map[string]interface{} `toml:"params"`
+	Permalinks map[string]string      `toml:"permalinks"`
+	Generated  time.Time              `toml:"-"`
+	Root       *Page                  `toml:"-"`
 	permalinks map[string]*template.Template
 	templates  Templates
 }