diff --git a/.travis.yml b/.travis.yml
index 16dcc1642..f2cefff99 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -42,7 +42,7 @@ jobs:
       install: echo ""
       before_script:
         - rustup update
-        - rustup override set nightly
+        - rustup override set nightly-2020-06-10
       script:
         - cargo build
         - cargo +stable fmt -- --check
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 2ec9bf808..89a4a0a33 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -19,7 +19,7 @@ stages:
       pool: {vmImage: 'macOS-10.15'}
       variables:
         python.version: '3.7'
-        CIBW_BEFORE_BUILD: pip install -U setuptools-rust && rustup default nightly
+        CIBW_BEFORE_BUILD: pip install -U setuptools-rust && rustup default nightly-2020-06-10
         CIBW_SKIP: cp27-* cp34-* pp*
         TWINE_USERNAME: retworkx-ci
         CIBW_TEST_COMMAND: python -m unittest discover {project}/tests
@@ -43,7 +43,7 @@ stages:
       pool: {vmImage: 'vs2017-win2016'}
       condition: startsWith(variables['Build.SourceBranch'], 'refs/tags')
       variables:
-        CIBW_BEFORE_BUILD: rustup default nightly && pip install -U setuptools-rust
+        CIBW_BEFORE_BUILD: rustup default nightly-2020-06-10 && pip install -U setuptools-rust
         CIBW_SKIP: cp27-* cp34-* pp* *win32
         TWINE_USERNAME: retworkx-ci
         CIBW_TEST_COMMAND: python -m unittest discover {project}/tests
@@ -65,7 +65,7 @@ stages:
       pool: {vmImage: 'vs2017-win2016'}
       condition: startsWith(variables['Build.SourceBranch'], 'refs/tags')
       variables:
-        CIBW_BEFORE_BUILD: rustup default nightly-i686-pc-windows-msvc && pip install -U setuptools-rust
+        CIBW_BEFORE_BUILD: rustup default nightly-i686-pc-windows-msvc-2020-06-10 && pip install -U setuptools-rust
         CIBW_SKIP: cp27-* cp34-* pp* *amd64
         TWINE_USERNAME: retworkx-ci
         CIBW_TEST_COMMAND: python -m unittest discover {project}/tests
@@ -100,7 +100,7 @@ stages:
           inputs:
             versionSpec: '$(python.version)'
           displayName: 'Use Python $(python.version)'
-        - bash: rustup default nightly
+        - bash: rustup default nightly-2020-06-10
           displayName: 'Install Rust'
         - bash: python -m pip install --upgrade pip setuptools virtualenv setuptools-rust
           displayName: 'Install dependencies'
@@ -126,7 +126,7 @@ stages:
           inputs:
             versionSpec: '$(python.version)'
           displayName: 'Use Python $(python.version)'
-        - bash: rustup default nightly
+        - bash: rustup default nightly-2020-06-10
           displayName: 'Install Rust'
         - bash: |
             set -e
@@ -165,7 +165,7 @@ stages:
           inputs:
             versionSpec: '$(python.version)'
           displayName: 'Use Python $(python.version)'
-        - bash: rustup default nightly
+        - bash: rustup default nightly-2020-06-10
           displayName: 'Install Rust'
         - bash: python -m pip install --upgrade pip setuptools virtualenv setuptools-rust
           displayName: 'Install dependencies'
@@ -195,7 +195,7 @@ stages:
           inputs:
             versionSpec: '$(python.version)'
           displayName: 'Use Python $(python.version)'
-        - bash: rustup default nightly
+        - bash: rustup default nightly-2020-06-10
           displayName: 'Install Rust'
         - bash: |
             set -e
diff --git a/tools/install_rust.sh b/tools/install_rust.sh
index 1a7d3c84b..77363aa26 100755
--- a/tools/install_rust.sh
+++ b/tools/install_rust.sh
@@ -1,5 +1,5 @@
 if [ ! -d rust-installer ]; then
     mkdir rust-installer
     wget https://sh.rustup.rs -O rust-installer/rustup.sh
-    sh rust-installer/rustup.sh --default-toolchain nightly -y
+    sh rust-installer/rustup.sh --default-toolchain nightly-2020-06-10 -y
 fi