diff --git a/src/ci/run.sh b/src/ci/run.sh
index 59f2736cbd406..ff737ea869f2b 100755
--- a/src/ci/run.sh
+++ b/src/ci/run.sh
@@ -51,7 +51,7 @@ fi
 #
 # FIXME: need a scheme for changing this `nightly` value to `beta` and `stable`
 #        either automatically or manually.
-export RUST_RELEASE_CHANNEL=nightly
+export RUST_RELEASE_CHANNEL=beta
 
 # Always set the release channel for bootstrap; this is normally not important (i.e., only dist
 # builds would seem to matter) but in practice bootstrap wants to know whether we're targeting
diff --git a/src/stage0.txt b/src/stage0.txt
index 150d7a0943db0..0778fbab7ea2c 100644
--- a/src/stage0.txt
+++ b/src/stage0.txt
@@ -12,15 +12,15 @@
 # source tarball for a stable release you'll likely see `1.x.0` for rustc and
 # `0.(x+1).0` for Cargo where they were released on `date`.
 
-date: 2020-04-22
-rustc: beta
-cargo: beta
+date: 2020-06-01
+rustc: 1.44.0
+cargo: 0.45.0
 
 # We use a nightly rustfmt to format the source because it solves some
 # bootstrapping issues with use of new syntax in this repo. If you're looking at
 # the beta/stable branch, this key should be omitted, as we don't want to depend
 # on rustfmt from nightly there.
-rustfmt: nightly-2020-04-22
+#rustfmt: nightly-2020-04-22
 
 # When making a stable release the process currently looks like:
 #
@@ -40,4 +40,4 @@ rustfmt: nightly-2020-04-22
 # looking at a beta source tarball and it's uncommented we'll shortly comment it
 # out.
 
-#dev: 1
+dev: 1
diff --git a/src/tools/rustfmt b/src/tools/rustfmt
index aedff61f7ac4f..530eadf4b42dd 160000
--- a/src/tools/rustfmt
+++ b/src/tools/rustfmt
@@ -1 +1 @@
-Subproject commit aedff61f7ac4fc2b287ff76d33f2584e1f63a3af
+Subproject commit 530eadf4b42ddf35b209d4f4acd120f3fcc467ce