diff --git a/src/npm.rs b/src/npm.rs
index c97fc2d..a2e4fe9 100644
--- a/src/npm.rs
+++ b/src/npm.rs
@@ -217,7 +217,7 @@ fn range(input: &str) -> ParseResult<VersionRange> {
       start: hyphen.start.as_lower_bound(),
       end: hyphen.end.as_upper_bound(),
     }),
-    map(separated_list(simple, whitespace), |ranges| {
+    map(separated_list(simple, range_separator), |ranges| {
       let mut final_range = VersionRange::all();
       for range in ranges {
         final_range = final_range.clamp(&range);
@@ -227,6 +227,14 @@ fn range(input: &str) -> ParseResult<VersionRange> {
   )(input)
 }
 
+fn range_separator(input: &str) -> ParseResult<()> {
+  fn comma(input: &str) -> ParseResult<()> {
+    map(delimited(skip_whitespace, ch(','), skip_whitespace), |_| ())(input)
+  }
+
+  or3(map(logical_and, |_| ()), comma, map(whitespace, |_| ()))(input)
+}
+
 #[derive(Debug, Clone)]
 struct Hyphen {
   start: Partial,
@@ -254,6 +262,11 @@ fn logical_or(input: &str) -> ParseResult<&str> {
   delimited(skip_whitespace, tag("||"), skip_whitespace)(input)
 }
 
+// logical-and ::= ( ' ' ) * '&&' ( ' ' ) *
+fn logical_and(input: &str) -> ParseResult<&str> {
+  delimited(skip_whitespace, tag("&&"), skip_whitespace)(input)
+}
+
 fn skip_whitespace_or_v(input: &str) -> ParseResult<()> {
   map(
     pair(skip_whitespace, pair(maybe(ch('v')), skip_whitespace)),
@@ -635,6 +648,28 @@ mod tests {
     assert!(!tester.matches("6.1.0"));
   }
 
+  #[test]
+  pub fn npm_version_req_and_range() {
+    let tester = NpmVersionReqTester::new(">= 1.2 && <= 2.0.0");
+    assert!(!tester.matches("1.1.9"));
+    assert!(tester.matches("1.2.2"));
+    assert!(tester.matches("1.2.0"));
+    assert!(tester.matches("1.9.9"));
+    assert!(!tester.matches("2.1.1"));
+    assert!(!tester.matches("2.0.1"));
+  }
+
+  #[test]
+  pub fn npm_version_req_comma_range() {
+    let tester = NpmVersionReqTester::new(">= 1.2, <= 2.0.0");
+    assert!(!tester.matches("1.1.9"));
+    assert!(tester.matches("1.2.2"));
+    assert!(tester.matches("1.2.0"));
+    assert!(tester.matches("1.9.9"));
+    assert!(!tester.matches("2.1.1"));
+    assert!(!tester.matches("2.0.1"));
+  }
+
   #[test]
   pub fn npm_version_req_with_tag() {
     let req = parse_npm_version_req("latest").unwrap();