diff --git a/lib/lexer.js b/lib/lexer.js
index ad375971..59536db8 100644
--- a/lib/lexer.js
+++ b/lib/lexer.js
@@ -172,7 +172,7 @@
       }
       doc = match[2] || match[4];
       indent = (doc.match(HEREDOC_INDENT) || ['']).sort()[0];
-      doc = doc.replace(new RegExp("^" + indent, 'gm'), '').replace(MULTILINER, "\\n").replace('"', '\\"');
+      doc = doc.replace(new RegExp("^" + indent, 'gm'), '').replace(MULTILINER, "\\n").replace(/"/g, '\\"');
       this.token('STRING', '"' + doc + '"');
       this.line += this.count(match[1], "\n");
       this.i += match[1].length;
diff --git a/src/lexer.coffee b/src/lexer.coffee
index 7d790605..e824d6ea 100644
--- a/src/lexer.coffee
+++ b/src/lexer.coffee
@@ -159,7 +159,7 @@ exports.Lexer: class Lexer
     indent: (doc.match(HEREDOC_INDENT) or ['']).sort()[0]
     doc: doc.replace(new RegExp("^" + indent, 'gm'), '')
             .replace(MULTILINER, "\\n")
-            .replace('"', '\\"')
+            .replace(/"/g, '\\"')
     @token 'STRING', '"' + doc + '"'
     @line += @count match[1], "\n"
     @i += match[1].length
diff --git a/test/test_heredocs.coffee b/test/test_heredocs.coffee
index d9f8e8f0..b9cd2e2c 100644
--- a/test/test_heredocs.coffee
+++ b/test/test_heredocs.coffee
@@ -36,6 +36,7 @@ a: '''
 
 ok a is "    a\n  b\nc"
 
+
 a: '''
 a
 
@@ -44,3 +45,8 @@ b c
 '''
 
 ok a is "a\n\n\nb c"
+
+
+a: '''more"than"one"quote'''
+
+ok a is 'more"than"one"quote'
\ No newline at end of file