diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index df50360..0eb47cf 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -3,7 +3,7 @@ name: CI
 env:
   CARGO_TERM_COLOR: always
   CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse
-  NIGHTLY: nightly-2025-11-06
+  NIGHTLY: nightly-2026-04-17
 
 on:
   push:
@@ -26,14 +26,14 @@ jobs:
       - name: Install MSRV toolchain
         uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: "1.88"
+          toolchain: "1.89"
 
       - uses: Swatinem/rust-cache@v2
         with:
           # A stable compiler update should automatically not reuse old caches.
           # Add the MSRV as a stable cache key too so bumping it also gets us a
           # fresh cache.
-          shared-key: msrv1.88
+          shared-key: msrv1.89
 
       - name: Run checks
         run: cargo check --all-features
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 65ddf34..c6fe5dc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 ## [unreleased]
 
+Breaking changes:
+
+- Upgrade Ruma to 0.15.0
+  - Bump MSRV to 1.89.
+
 ## 0.9.0
 
 Breaking changes:
diff --git a/Cargo.toml b/Cargo.toml
index e477f53..4a31012 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,7 +8,7 @@ keywords = ["matrix", "chat", "messaging", "ruma"]
 license = "MIT"
 repository = "https://github.com/ruma/synapse-admin-api"
 edition = "2024"
-rust-version = "1.88"
+rust-version = "1.89"
 
 [features]
 client = []
@@ -19,7 +19,7 @@ shared-secret-registration-mac = ["dep:hex", "dep:hmac", "dep:sha1"]
 [dependencies]
 hex = { version = "0.4.3", optional = true }
 hmac = { version = "0.12.1", optional = true }
-ruma = { version = "0.14.1", features = ["api", "events"] }
+ruma = { version = "0.15.0", features = ["api", "events"] }
 serde = { version = "1.0.118", features = ["derive"] }
 sha1 = { version = "0.10.1", optional = true }