diff --git a/src/parser.rs b/src/parser.rs
index 9ea35af..a4267c3 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -319,7 +319,7 @@ impl<'a> Parser<'a> {
             '"' => self.parse_basic_string(),
             '\'' => self.parse_literal_string(),
             // Boolean: true
-            't' if &self.src[self.idx..self.idx + 4] == "true" => {
+            't' if self.src[self.idx..].starts_with("true") => {
                 self.inc();
                 self.inc();
                 self.inc();
@@ -331,7 +331,7 @@ impl<'a> Parser<'a> {
                 })
             }
             // Boolean: False
-            'f' if &self.src[self.idx..self.idx + 5] == "false" => {
+            'f' if self.src[self.idx..].starts_with("false") => {
                 self.inc();
                 self.inc();
                 self.inc();
@@ -744,4 +744,16 @@ mod tests {
         invalid_ints.iter().for_each(|s| {assert_eq!(None, Parser::parse_number(s, Trivia::default()))});
         invalid_floats.iter().for_each(|s| {assert_eq!(None, Parser::parse_number(s, Trivia::default()))});
     }
+
+    #[test]
+    fn issue41() {
+        let text = ::std::str::from_utf8(b"\'\'fb\'\xee\x9d\xbd").unwrap();
+        let _ = Parser::new(text).parse();
+    }
+
+    #[test]
+    fn issue42() {
+        let text = ::std::str::from_utf8(b"\'\nv\'f%\nb").unwrap();
+        let _ = Parser::new(text).parse();
+    }
 }
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