diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 63ad16d..f219ffe 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -398,7 +398,7 @@
     needs: compiler
     runs-on: ubuntu-22.04
     env:
-      TOOLCHAIN_VERSION: 1.65.0
+      TOOLCHAIN_VERSION: 1.81.0
     steps:
       - uses: actions/checkout@v4
 
diff --git a/LANGUAGES.md b/LANGUAGES.md
index 26ee555..3978f24 100644
--- a/LANGUAGES.md
+++ b/LANGUAGES.md
@@ -319,7 +319,7 @@
 <td align=left><a href="https://github.com/apache/thrift/blob/master/lib/rs/README.md">Rust</a></td>
 <!-- Since -----------------><td>0.11.0</td>
 <!-- Build Systems ---------><td><img src="/doc/images/cgrn.png" alt="Yes"/></td><td><img src="/doc/images/cred.png" alt=""/></td>
-<!-- Language Levels -------><td>1.65.0</td><td>1.xx.x</td>
+<!-- Language Levels -------><td>1.81.0</td><td>1.xx.x</td>
 <!-- Field types -----------><td><img src="/doc/images/cred.png" alt=""/></td>
 <!-- Low-Level Transports --><td><img src="/doc/images/cred.png" alt=""/></td><td><img src="/doc/images/cred.png" alt=""/></td><td><img src="/doc/images/cgrn.png" alt="Yes"/></td><td><img src="/doc/images/cred.png" alt=""/></td><td><img src="/doc/images/cgrn.png" alt="Yes"/></td><td><img src="/doc/images/cred.png" alt=""/></td>
 <!-- Transport Wrappers ----><td><img src="/doc/images/cgrn.png" alt="Yes"/></td><td><img src="/doc/images/cred.png" alt=""/></td><td><img src="/doc/images/cred.png" alt=""/></td><td><img src="/doc/images/cred.png" alt=""/></td>
diff --git a/build/docker/README.md b/build/docker/README.md
index 2a338b4..de7e9c7 100644
--- a/build/docker/README.md
+++ b/build/docker/README.md
@@ -196,6 +196,6 @@
 | python2   | 2.7.18        |               |       |
 | python3   | 3.8.10        | 3.10.12       |       |
 | ruby      | 2.7.0p0       | 3.0.2p107     |       |
-| rust      | 1.65.0        | 1.65.0        |       |
+| rust      | 1.81.0        | 1.81.0        |       |
 | smalltalk |               |               | Not in CI |
 | swift     | 5.7           | 5.7           |       |
diff --git a/build/docker/ubuntu-focal/Dockerfile b/build/docker/ubuntu-focal/Dockerfile
index a29ec69..8c2cd61 100644
--- a/build/docker/ubuntu-focal/Dockerfile
+++ b/build/docker/ubuntu-focal/Dockerfile
@@ -274,7 +274,7 @@
 
 USER ${user}
 RUN `# Rust dependencies` \
-    curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain 1.65.0 -y
+    curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain 1.81.0 -y
 ENV PATH /home/${user}/.cargo/bin:$PATH
 USER root
 
diff --git a/build/docker/ubuntu-jammy/Dockerfile b/build/docker/ubuntu-jammy/Dockerfile
index 5fa6e6f..dc9b9d2 100644
--- a/build/docker/ubuntu-jammy/Dockerfile
+++ b/build/docker/ubuntu-jammy/Dockerfile
@@ -273,7 +273,7 @@
 
 USER ${user}
 RUN `# Rust dependencies` \
-    curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain 1.65.0 -y
+    curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain 1.81.0 -y
 ENV PATH /home/${user}/.cargo/bin:$PATH
 USER root
 
diff --git a/lib/rs/src/protocol/compact.rs b/lib/rs/src/protocol/compact.rs
index c0c4372..8ed4e06 100644
--- a/lib/rs/src/protocol/compact.rs
+++ b/lib/rs/src/protocol/compact.rs
@@ -681,8 +681,6 @@
 #[cfg(test)]
 mod tests {
 
-    use std::i32;
-
     use crate::protocol::{
         TFieldIdentifier, TInputProtocol, TListIdentifier, TMapIdentifier, TMessageIdentifier,
         TMessageType, TOutputProtocol, TSetIdentifier, TStructIdentifier, TType,
@@ -2818,7 +2816,7 @@
         copy_write_buffer_to_read_buffer!(o_prot);
 
         let read_double = i_prot.read_double().unwrap();
-        assert!(read_double - double < std::f64::EPSILON);
+        assert!((read_double - double).abs() < f64::EPSILON);
     }
 
     #[test]
diff --git a/lib/rs/src/transport/framed.rs b/lib/rs/src/transport/framed.rs
index c30ccd9..d8a7448 100644
--- a/lib/rs/src/transport/framed.rs
+++ b/lib/rs/src/transport/framed.rs
@@ -97,7 +97,7 @@
             self.buf.resize(buf_capacity, 0);
 
             self.chan.read_exact(&mut self.buf[..message_size])?;
-            self.cap = message_size as usize;
+            self.cap = message_size;
             self.pos = 0;
         }
 
diff --git a/rust-toolchain b/rust-toolchain
index 902c741..dbd4126 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1 +1 @@
-1.65.0
+1.81.0