diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index f3f4b781..02f5c677 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         toolchain: 
-          - "1.63"  # MSRV
+          - "1.65"  # MSRV
           - stable
           - beta
           - nightly
diff --git a/Cargo.toml b/Cargo.toml
index f5c4e176..0a5c03e9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ keywords = ["excel", "ods", "xls", "xlsx", "xlsb"]
 categories = ["encoding", "parsing", "text-processing"]
 exclude = ["tests/**/*"]
 edition = "2021"
-rust-version = "1.63"
+rust-version = "1.65"
 
 [dependencies]
 byteorder = "1.4"