diff --git a/build/moz.configure/rust.configure b/build/moz.configure/rust.configure
index b640269e39db..f02299fc1b7d 100644
--- a/build/moz.configure/rust.configure
+++ b/build/moz.configure/rust.configure
@@ -67,7 +67,7 @@ def rust_compiler(rustc_info, cargo_info):
         You can install rust by running './mach bootstrap'
         or by directly running the installer from https://rustup.rs/
         '''))
-    rustc_min_version = Version('1.26.0')
+    rustc_min_version = Version('1.27.0')
     cargo_min_version = rustc_min_version
 
     version = rustc_info.version
diff --git a/python/mozboot/mozboot/base.py b/python/mozboot/mozboot/base.py
index 55f6728de202..40fe0f63dcbf 100644
--- a/python/mozboot/mozboot/base.py
+++ b/python/mozboot/mozboot/base.py
@@ -150,7 +150,7 @@ MODERN_MERCURIAL_VERSION = LooseVersion('4.3.3')
 MODERN_PYTHON_VERSION = LooseVersion('2.7.3')
 
 # Upgrade rust older than this.
-MODERN_RUST_VERSION = LooseVersion('1.26.0')
+MODERN_RUST_VERSION = LooseVersion('1.27.0')
 
 
 class BaseBootstrapper(object):
diff --git a/taskcluster/ci/build/linux.yml b/taskcluster/ci/build/linux.yml
index e3373aff1aa9..e6ea81ddd43a 100644
--- a/taskcluster/ci/build/linux.yml
+++ b/taskcluster/ci/build/linux.yml
@@ -265,7 +265,7 @@ linux64-base-toolchains/opt:
     toolchains:
         - linux64-clang-3.9
         - linux64-gcc-6
-        - linux64-rust-1.26
+        - linux64-rust-1.27
         - linux64-sccache
 
 linux64-base-toolchains/debug:
@@ -295,7 +295,7 @@ linux64-base-toolchains/debug:
     toolchains:
         - linux64-clang-3.9
         - linux64-gcc-6
-        - linux64-rust-1.26
+        - linux64-rust-1.27
         - linux64-sccache
 
 linux/opt:
diff --git a/taskcluster/ci/toolchain/linux.yml b/taskcluster/ci/toolchain/linux.yml
index f8c05a2faaf1..b6912ad6fc25 100755
--- a/taskcluster/ci/toolchain/linux.yml
+++ b/taskcluster/ci/toolchain/linux.yml
@@ -391,12 +391,12 @@ linux64-android-gradle-dependencies:
         # Aliases aren't allowed for toolchains depending on toolchains.
         - linux64-android-sdk-linux-repack
 
-linux64-rust-1.26:
+linux64-rust-1.27:
     description: "rust repack"
     treeherder:
         kind: build
         platform: toolchains/opt
-        symbol: TL(rust-1.26)
+        symbol: TL(rust-1.27)
         tier: 1
     worker-type: aws-provisioner-v1/gecko-{level}-b-linux
     worker:
@@ -407,7 +407,7 @@ linux64-rust-1.26:
         using: toolchain-script
         script: repack_rust.py
         arguments: [
-            '--channel', '1.26.2',
+            '--channel', '1.27.0',
             '--host', 'x86_64-unknown-linux-gnu',
             '--target', 'x86_64-unknown-linux-gnu',
             '--target', 'i686-unknown-linux-gnu',