diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7ee05105..12d4ba01 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        rust: ["1.40.0", "stable", "beta", "nightly"]
+        rust: ["1.46.0", "stable", "beta", "nightly"]
     name: Check (${{ matrix.rust }})
     steps:
       - uses: actions/checkout@v2
diff --git a/codespan-lsp/CHANGELOG.md b/codespan-lsp/CHANGELOG.md
index 587d22da..71c6cfa8 100644
--- a/codespan-lsp/CHANGELOG.md
+++ b/codespan-lsp/CHANGELOG.md
@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+The minimum supported rustc version is now `1.46.0` (was `1.40.0`).
+This is because some dependencies now require this Rust version.
+
 ### Changed
 
 -   The `lsp-types` dependency was updated to use a version range: `>=0.84, <0.90`,
diff --git a/codespan-reporting/CHANGELOG.md b/codespan-reporting/CHANGELOG.md
index 53ae73b6..14c47660 100644
--- a/codespan-reporting/CHANGELOG.md
+++ b/codespan-reporting/CHANGELOG.md
@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+The minimum supported rustc version is now `1.46.0` (was `1.40.0`).
+This is because some testing dependencies now require this Rust version.
+
 ### Added
 
 -   Add the option to display a configurable amount of lines in front of and after any label.
diff --git a/codespan/CHANGELOG.md b/codespan/CHANGELOG.md
index d68597b7..417e156c 100644
--- a/codespan/CHANGELOG.md
+++ b/codespan/CHANGELOG.md
@@ -7,7 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
-## [0.11.1] - 2021-01-18
+The minimum supported rustc version is now `1.46.0` (was `1.40.0`).
+This is because dependencies of `codespan-lsp` now require this Rust version.
 
 ### Fixed