--- a/build/moz.configure/rust.configure
+++ b/build/moz.configure/rust.configure
@@ -45,17 +45,17 @@ def rust_compiler(rustc, rustc_info):
         Rust compiler not found.
         To compile rust language sources, you must have 'rustc' in your path.
         See https//www.rust-lang.org/ for more information.
 
         You can install rust by running './mach bootstrap'
         or by directly running the installer from https://rustup.rs/
         '''))
     version = rustc_info.version
-    min_version = Version('1.13')
+    min_version = Version('1.15.1')
     if version < min_version:
         die(dedent('''\
         Rust compiler {} is too old.
 
         To compile Rust language sources please install at least
         version {} of the 'rustc' toolchain and make sure it is
         first in your path.
 

--- a/python/mozboot/mozboot/base.py
+++ b/python/mozboot/mozboot/base.py
@@ -145,17 +145,17 @@ ac_add_options --enable-artifact-builds
 # This should match OLDEST_NON_LEGACY_VERSION from
 # the hg setup wizard in version-control-tools.
 MODERN_MERCURIAL_VERSION = LooseVersion('3.7.3')
 
 # Upgrade Python older than this.
 MODERN_PYTHON_VERSION = LooseVersion('2.7.3')
 
 # Upgrade rust older than this.
-MODERN_RUST_VERSION = LooseVersion('1.13.0')
+MODERN_RUST_VERSION = LooseVersion('1.15.1')
 
 class BaseBootstrapper(object):
     """Base class for system bootstrappers."""
 
     def __init__(self, no_interactive=False):
         self.package_manager_updated = False
         self.no_interactive = no_interactive