diff --git a/config.go b/config.go
index c9f7c15..3d9c31a 100644
--- a/config.go
+++ b/config.go
@@ -11,8 +11,8 @@ import (
 )
 
 type Config struct {
-	Port int
-	AB   string
+	Port            int
+	InitializeSlack bool
 }
 
 func newConfig() (Config, error) {
@@ -55,6 +55,12 @@ func newConfigFromEnv(getEnv func(string) string) (Config, error) {
 				return Config{}, err
 			}
 			m[k] = n
+		case bool:
+			got, err := strconv.ParseBool(s)
+			if err != nil {
+				return Config{}, err
+			}
+			m[k] = got
 		}
 	}
 
diff --git a/config_test.go b/config_test.go
index b113eee..aab228a 100644
--- a/config_test.go
+++ b/config_test.go
@@ -8,8 +8,8 @@ func TestNewConfig(t *testing.T) {
 		switch k {
 		case "PORT":
 			return "1"
-		case "A_B":
-			return "2"
+		case "INITIALIZE_SLACK":
+			return "true"
 		default:
 			return ""
 		}
@@ -17,7 +17,7 @@ func TestNewConfig(t *testing.T) {
 		t.Fatal(err)
 	} else if got.Port != 1 {
 		t.Error(got)
-	} else if got.AB != "2" {
+	} else if !got.InitializeSlack {
 		t.Error(got)
 	}
 }