diff --git a/gjson.go b/gjson.go
index 4cb00e3..cac5e0b 100644
--- a/gjson.go
+++ b/gjson.go
@@ -106,7 +106,8 @@ func (t Result) Bool() bool {
 	case True:
 		return true
 	case String:
-		return t.Str != "" && t.Str != "0" && t.Str != "false"
+		b, err := strconv.ParseBool(t.Str)
+		return !(!b || err != nil)
 	case Number:
 		return t.Num != 0
 	}
diff --git a/gjson_test.go b/gjson_test.go
index 36a4273..eba498f 100644
--- a/gjson_test.go
+++ b/gjson_test.go
@@ -313,10 +313,25 @@ func TestTypes(t *testing.T) {
 	assert(t, (Result{Type: JSON}).Type.String() == "JSON")
 	assert(t, (Result{Type: 100}).Type.String() == "")
 	// bool
-	assert(t, (Result{Type: String, Str: "true"}).Bool())
 	assert(t, (Result{Type: True}).Bool())
 	assert(t, (Result{Type: False}).Bool() == false)
 	assert(t, (Result{Type: Number, Num: 1}).Bool())
+	assert(t, (Result{Type: String, Str: "1"}).Bool())
+	assert(t, (Result{Type: String, Str: "T"}).Bool())
+	assert(t, (Result{Type: String, Str: "t"}).Bool())
+	assert(t, (Result{Type: String, Str: "true"}).Bool())
+	assert(t, (Result{Type: String, Str: "True"}).Bool())
+	assert(t, (Result{Type: String, Str: "TRUE"}).Bool())
+	assert(t, (Result{Type: String, Str: "tRuE"}).Bool() == false)
+	assert(t, (Result{Type: String, Str: "0"}).Bool() == false)
+	assert(t, (Result{Type: String, Str: "f"}).Bool() == false)
+	assert(t, (Result{Type: String, Str: "F"}).Bool() == false)
+	assert(t, (Result{Type: String, Str: "false"}).Bool() == false)
+	assert(t, (Result{Type: String, Str: "False"}).Bool() == false)
+	assert(t, (Result{Type: String, Str: "FALSE"}).Bool() == false)
+	assert(t, (Result{Type: String, Str: "fAlSe"}).Bool() == false)
+	assert(t, (Result{Type: String, Str: "random"}).Bool() == false)
+
 	// int
 	assert(t, (Result{Type: String, Str: "1"}).Int() == 1)
 	assert(t, (Result{Type: True}).Int() == 1)