diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b91bd1d4f..0001aa892 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -89,9 +89,9 @@ jobs:
           - os: macos-latest
             rust: 1.76.0
 
-          # Minimum Supported Rust Version = 1.74.0
+          # Minimum Supported Rust Version = 1.70.0
           - os: ubuntu-latest
-            rust: 1.74.0
+            rust: 1.70.0
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
diff --git a/Cargo.lock b/Cargo.lock
index 14e06b373..b781e6c59 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -709,18 +709,18 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "4.5.1"
+version = "4.4.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c918d541ef2913577a0f9566e9ce27cb35b6df072075769e0b26cb5a554520da"
+checksum = "1e578d6ec4194633722ccf9544794b71b1385c3c027efe0c55db226fc880865c"
 dependencies = [
  "clap_builder",
 ]
 
 [[package]]
 name = "clap_builder"
-version = "4.5.1"
+version = "4.4.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9f3e7391dad68afb0c2ede1bf619f579a3dc9c2ec67f089baa397123a2f3d1eb"
+checksum = "4df4df40ec50c46000231c914968278b1eb05098cf8f1b3a518a95030e71d1c7"
 dependencies = [
  "anstyle",
  "clap_lex",
@@ -728,9 +728,9 @@ dependencies = [
 
 [[package]]
 name = "clap_lex"
-version = "0.7.0"
+version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "98cc8fbded0c607b7ba9dd60cd98df59af97e84d24e49c8557331cfc26d301ce"
+checksum = "702fc72eb24e5a1e48ce58027a675bc24edd52096d5397d4aea7c6dd9eca0bd1"
 
 [[package]]
 name = "clipboard-win"
diff --git a/Cargo.toml b/Cargo.toml
index 5be195ad6..0a4157889 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,7 +3,7 @@ name = "deltachat"
 version = "1.136.0"
 edition = "2021"
 license = "MPL-2.0"
-rust-version = "1.74"
+rust-version = "1.70"
 
 [profile.dev]
 debug = 0