diff --git a/components/servo/Cargo.lock b/components/servo/Cargo.lock
index 83800fc7709..d61b2571292 100644
--- a/components/servo/Cargo.lock
+++ b/components/servo/Cargo.lock
@@ -479,7 +479,7 @@ dependencies = [
 [[package]]
 name = "js"
 version = "0.1.0"
-source = "git+https://github.com/servo/rust-mozjs#879b256e6bc5b38f792b68da130eb7a70633769b"
+source = "git+https://github.com/servo/rust-mozjs#9512c3c770774ed73a2fdcc635eee178cbd02ab1"
 dependencies = [
  "libc 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "mozjs_sys 0.0.0 (git+https://github.com/servo/mozjs)",
@@ -617,7 +617,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "mozjs_sys"
 version = "0.0.0"
-source = "git+https://github.com/servo/mozjs#40e0680008cb129ddf9ccf40c6b0095e14d1cd97"
+source = "git+https://github.com/servo/mozjs#19edb950930f03f0ad305ffbd9548b92fdb0a250"
 
 [[package]]
 name = "msg"
diff --git a/ports/cef/Cargo.lock b/ports/cef/Cargo.lock
index 7cd06499343..3fcab77d28b 100644
--- a/ports/cef/Cargo.lock
+++ b/ports/cef/Cargo.lock
@@ -482,7 +482,7 @@ dependencies = [
 [[package]]
 name = "js"
 version = "0.1.0"
-source = "git+https://github.com/servo/rust-mozjs#879b256e6bc5b38f792b68da130eb7a70633769b"
+source = "git+https://github.com/servo/rust-mozjs#9512c3c770774ed73a2fdcc635eee178cbd02ab1"
 dependencies = [
  "libc 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "mozjs_sys 0.0.0 (git+https://github.com/servo/mozjs)",
@@ -620,7 +620,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "mozjs_sys"
 version = "0.0.0"
-source = "git+https://github.com/servo/mozjs#40e0680008cb129ddf9ccf40c6b0095e14d1cd97"
+source = "git+https://github.com/servo/mozjs#19edb950930f03f0ad305ffbd9548b92fdb0a250"
 
 [[package]]
 name = "msg"
diff --git a/ports/gonk/Cargo.lock b/ports/gonk/Cargo.lock
index ddc5afd7988..7de597c61f9 100644
--- a/ports/gonk/Cargo.lock
+++ b/ports/gonk/Cargo.lock
@@ -415,7 +415,7 @@ dependencies = [
 [[package]]
 name = "js"
 version = "0.1.0"
-source = "git+https://github.com/servo/rust-mozjs#879b256e6bc5b38f792b68da130eb7a70633769b"
+source = "git+https://github.com/servo/rust-mozjs#9512c3c770774ed73a2fdcc635eee178cbd02ab1"
 dependencies = [
  "libc 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "mozjs_sys 0.0.0 (git+https://github.com/servo/mozjs)",
@@ -545,7 +545,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "mozjs_sys"
 version = "0.0.0"
-source = "git+https://github.com/servo/mozjs#40e0680008cb129ddf9ccf40c6b0095e14d1cd97"
+source = "git+https://github.com/servo/mozjs#19edb950930f03f0ad305ffbd9548b92fdb0a250"
 
 [[package]]
 name = "msg"