diff --git a/.licenserc.yaml b/.licenserc.yaml
index 6bbef770..ac72c37e 100644
--- a/.licenserc.yaml
+++ b/.licenserc.yaml
@@ -66,6 +66,7 @@ header: # `header` section is configurations for source codes license header.
     - "**/*.yaml"
     - "**/generated/**"
     - "**/fixtures/**"
+    - 'rust-toolchain'
   comment: on-failure # on what condition license-eye will comment on the pull request, `on-failure`, `always`, `never`.
 
   # license-location-threshold specifies the index threshold where the license header can be located,
diff --git a/rust-toolchain b/rust-toolchain
new file mode 100644
index 00000000..bf867e0a
--- /dev/null
+++ b/rust-toolchain
@@ -0,0 +1 @@
+nightly