diff --git a/.github/workflows/test-android.yml b/.github/workflows/test-android.yml
index f7b9a3ae3c43..2acf3c272ce7 100644
--- a/.github/workflows/test-android.yml
+++ b/.github/workflows/test-android.yml
@@ -33,8 +33,8 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: install Rust stable
-        uses: dtolnay/rust-toolchain@stable
+      - name: install Rust 1.77.2
+        uses: dtolnay/rust-toolchain@1.77.2
 
       - name: install Linux dependencies
         if: matrix.platform == 'ubuntu-latest'
diff --git a/.github/workflows/test-cli-rs.yml b/.github/workflows/test-cli-rs.yml
index a0bcc1f63148..2d97c55b2645 100644
--- a/.github/workflows/test-cli-rs.yml
+++ b/.github/workflows/test-cli-rs.yml
@@ -44,7 +44,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: 'Setup Rust'
-        uses: dtolnay/rust-toolchain@stable
+        uses: dtolnay/rust-toolchain@1.77.2
         with:
           targets: ${{ matrix.platform.target }}
 
diff --git a/.github/workflows/test-core.yml b/.github/workflows/test-core.yml
index 6aef978f34bc..dac4465d7f2b 100644
--- a/.github/workflows/test-core.yml
+++ b/.github/workflows/test-core.yml
@@ -88,15 +88,6 @@ jobs:
           sudo apt-get update
           sudo apt-get install -y webkit2gtk-4.1 libxdo-dev libayatana-appindicator3-dev
 
-      - name: downgrade crates with MSRV conflict
-        run: |
-          cargo update -p aws-config --precise 1.5.5
-          cargo update -p aws-sdk-ssooidc --precise 1.40.0
-          cargo update -p aws-sdk-s3 --precise 1.46.0
-          cargo update -p aws-sdk-sts --precise 1.39.0
-          cargo update -p aws-sdk-sso --precise 1.39.0
-          cargo update -p bitstream-io --precise 2.3.0
-
       - uses: Swatinem/rust-cache@v2
         with:
           prefix-key: v2
diff --git a/Cargo.lock b/Cargo.lock
index 5666e68dccf5..14c598694204 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -579,9 +579,9 @@ dependencies = [
 
 [[package]]
 name = "aws-config"
-version = "1.5.9"
+version = "1.5.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2d6448cfb224dd6a9b9ac734f58622dd0d4751f3589f3b777345745f46b2eb14"
+checksum = "4e95816a168520d72c0e7680c405a5a8c1fb6a035b4bc4b9d7b0de8e1a941697"
 dependencies = [
  "aws-credential-types",
  "aws-runtime",
@@ -682,9 +682,9 @@ dependencies = [
 
 [[package]]
 name = "aws-sdk-sso"
-version = "1.48.0"
+version = "1.39.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ded855583fa1d22e88fe39fd6062b062376e50a8211989e07cf5e38d52eb3453"
+checksum = "11822090cf501c316c6f75711d77b96fba30658e3867a7762e5e2f5d32d31e81"
 dependencies = [
  "aws-credential-types",
  "aws-runtime",
@@ -704,9 +704,9 @@ dependencies = [
 
 [[package]]
 name = "aws-sdk-ssooidc"
-version = "1.49.0"
+version = "1.40.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9177ea1192e6601ae16c7273385690d88a7ed386a00b74a6bc894d12103cd933"
+checksum = "78a2a06ff89176123945d1bbe865603c4d7101bea216a550bb4d2e4e9ba74d74"
 dependencies = [
  "aws-credential-types",
  "aws-runtime",
@@ -726,9 +726,9 @@ dependencies = [
 
 [[package]]
 name = "aws-sdk-sts"
-version = "1.48.0"
+version = "1.39.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "823ef553cf36713c97453e2ddff1eb8f62be7f4523544e2a5db64caf80100f0a"
+checksum = "a20a91795850826a6f456f4a48eff1dfa59a0e69bdbf5b8c50518fd372106574"
 dependencies = [
  "aws-credential-types",
  "aws-runtime",
@@ -4867,7 +4867,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4979f22fdb869068da03c9f7528f8297c6fd2606bc3a4affe42e6a823fdb8da4"
 dependencies = [
  "cfg-if",
- "windows-targets 0.52.6",
+ "windows-targets 0.48.5",
 ]
 
 [[package]]
@@ -10798,7 +10798,7 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf221c93e13a30d793f7645a0e7762c55d169dbb0a49671918a2319d289b10bb"
 dependencies = [
- "windows-sys 0.59.0",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]