diff --git a/bigint/src/lib.rs b/bigint/src/lib.rs
index 9e6119b..5d261da 100644
--- a/bigint/src/lib.rs
+++ b/bigint/src/lib.rs
@@ -72,7 +72,7 @@
 #![doc(html_logo_url = "https://rust-num.github.io/num/rust-logo-128x128-blk-v2.png",
        html_favicon_url = "https://rust-num.github.io/num/favicon.ico",
        html_root_url = "https://rust-num.github.io/num/",
-       html_playground_url = "https://play.rust-lang.org/")]
+       html_playground_url = "http://play.integer32.com/")]
 
 #[cfg(any(feature = "rand", test))]
 extern crate rand;
diff --git a/complex/src/lib.rs b/complex/src/lib.rs
index a232a84..8a3718f 100644
--- a/complex/src/lib.rs
+++ b/complex/src/lib.rs
@@ -12,7 +12,7 @@
 #![doc(html_logo_url = "https://rust-num.github.io/num/rust-logo-128x128-blk-v2.png",
        html_favicon_url = "https://rust-num.github.io/num/favicon.ico",
        html_root_url = "https://rust-num.github.io/num/",
-       html_playground_url = "https://play.rust-lang.org/")]
+       html_playground_url = "http://play.integer32.com/")]
 
 extern crate num_traits as traits;
 
diff --git a/integer/src/lib.rs b/integer/src/lib.rs
index 314f2b5..00cc3ba 100644
--- a/integer/src/lib.rs
+++ b/integer/src/lib.rs
@@ -12,7 +12,7 @@
 #![doc(html_logo_url = "https://rust-num.github.io/num/rust-logo-128x128-blk-v2.png",
        html_favicon_url = "https://rust-num.github.io/num/favicon.ico",
        html_root_url = "https://rust-num.github.io/num/",
-       html_playground_url = "https://play.rust-lang.org/")]
+       html_playground_url = "http://play.integer32.com/")]
 
 extern crate num_traits as traits;
 
diff --git a/iter/src/lib.rs b/iter/src/lib.rs
index ace7bfe..68323ef 100644
--- a/iter/src/lib.rs
+++ b/iter/src/lib.rs
@@ -12,7 +12,7 @@
 #![doc(html_logo_url = "https://rust-num.github.io/num/rust-logo-128x128-blk-v2.png",
        html_favicon_url = "https://rust-num.github.io/num/favicon.ico",
        html_root_url = "https://rust-num.github.io/num/",
-       html_playground_url = "https://play.rust-lang.org/")]
+       html_playground_url = "http://play.integer32.com/")]
 
 extern crate num_traits as traits;
 extern crate num_integer as integer;
diff --git a/macros/src/lib.rs b/macros/src/lib.rs
index fc5a946..3bea3e6 100644
--- a/macros/src/lib.rs
+++ b/macros/src/lib.rs
@@ -12,7 +12,7 @@
 #![doc(html_logo_url = "https://rust-num.github.io/num/rust-logo-128x128-blk-v2.png",
        html_favicon_url = "https://rust-num.github.io/num/favicon.ico",
        html_root_url = "https://rust-num.github.io/num/",
-       html_playground_url = "https://play.rust-lang.org/")]
+       html_playground_url = "http://play.integer32.com/")]
 
 extern crate syntax;
 extern crate syntax_ext;
diff --git a/rational/src/lib.rs b/rational/src/lib.rs
index 52e7147..938de46 100644
--- a/rational/src/lib.rs
+++ b/rational/src/lib.rs
@@ -12,7 +12,7 @@
 #![doc(html_logo_url = "https://rust-num.github.io/num/rust-logo-128x128-blk-v2.png",
        html_favicon_url = "https://rust-num.github.io/num/favicon.ico",
        html_root_url = "https://rust-num.github.io/num/",
-       html_playground_url = "https://play.rust-lang.org/")]
+       html_playground_url = "http://play.integer32.com/")]
 
 #[cfg(feature = "rustc-serialize")]
 extern crate rustc_serialize;
diff --git a/src/lib.rs b/src/lib.rs
index a5d2f30..77b34c3 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -55,7 +55,7 @@
 #![doc(html_logo_url = "https://rust-num.github.io/num/rust-logo-128x128-blk-v2.png",
        html_favicon_url = "https://rust-num.github.io/num/favicon.ico",
        html_root_url = "https://rust-num.github.io/num/",
-       html_playground_url = "https://play.rust-lang.org/")]
+       html_playground_url = "http://play.integer32.com/")]
 
 extern crate num_traits;
 extern crate num_integer;
diff --git a/traits/src/lib.rs b/traits/src/lib.rs
index 8663bda..2cd85d4 100644
--- a/traits/src/lib.rs
+++ b/traits/src/lib.rs
@@ -12,7 +12,7 @@
 #![doc(html_logo_url = "https://rust-num.github.io/num/rust-logo-128x128-blk-v2.png",
        html_favicon_url = "https://rust-num.github.io/num/favicon.ico",
        html_root_url = "https://rust-num.github.io/num/",
-       html_playground_url = "https://play.rust-lang.org/")]
+       html_playground_url = "http://play.integer32.com/")]
 
 use std::ops::{Add, Sub, Mul, Div, Rem};