diff --git a/.github/workflows/cron.yml b/.github/workflows/cron.yml
index 40c8fad1..57e58a20 100644
--- a/.github/workflows/cron.yml
+++ b/.github/workflows/cron.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         rust:
-          - 1.66.0
+          - 1.70.0
           - stable
 
     steps:
diff --git a/.github/workflows/msrv.yml b/.github/workflows/msrv.yml
index 85395bc9..49b33561 100644
--- a/.github/workflows/msrv.yml
+++ b/.github/workflows/msrv.yml
@@ -9,7 +9,7 @@ jobs:
     strategy:
       matrix:
         rust:
-          - 1.66.0
+          - 1.70.0
           - stable
           - beta
           - nightly
@@ -39,7 +39,7 @@ jobs:
     strategy:
       matrix:
         rust:
-          - 1.66.0
+          - 1.70.0
           - stable
           - beta
           - nightly
@@ -95,7 +95,7 @@ jobs:
     strategy:
       matrix:
         rust:
-          - 1.66.0
+          - 1.70.0
           - 1.73.0
     steps:
       - name: Checkout sources
@@ -117,7 +117,7 @@ jobs:
     strategy:
       matrix:
         rust:
-          - 1.66.0
+          - 1.70.0
           - 1.73.0
 
     steps:
diff --git a/README.md b/README.md
index daa762b5..dca5c141 100644
--- a/README.md
+++ b/README.md
@@ -58,7 +58,7 @@ more usage information.
 
 ## MSRV
 
-We currently support Rust 1.66.0 and newer.
+We currently support Rust 1.70.0 and newer.
 
 
 ## License