diff --git a/Cargo.toml b/Cargo.toml
index cabe4b7d4..61fbd43d9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [workspace.package]
 edition = "2021"
 license = "MIT"
-rust-version = "1.83"
+rust-version = "1.81"
 authors = ["clabby", "refcell"]
 homepage = "https://github.com/anton-rs/kona"
 repository = "https://github.com/anton-rs/kona"
diff --git a/build/asterisc/asterisc-repro.dockerfile b/build/asterisc/asterisc-repro.dockerfile
index 03b328562..a644df173 100644
--- a/build/asterisc/asterisc-repro.dockerfile
+++ b/build/asterisc/asterisc-repro.dockerfile
@@ -76,7 +76,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   pkg-config
 
 # Install rust
-ENV RUST_VERSION=1.83.0
+ENV RUST_VERSION=1.81.0
 RUN curl https://sh.rustup.rs -sSf | bash -s -- -y --default-toolchain ${RUST_VERSION} --component rust-src
 ENV PATH="/root/.cargo/bin:${PATH}"
 
diff --git a/crates/derive/src/attributes/stateful.rs b/crates/derive/src/attributes/stateful.rs
index 3af01d213..c9390da66 100644
--- a/crates/derive/src/attributes/stateful.rs
+++ b/crates/derive/src/attributes/stateful.rs
@@ -1,3 +1,4 @@
+#![allow(clippy::unnecessary_map_or)]
 //! The [`AttributesBuilder`] and it's default implementation.
 
 use crate::{
@@ -214,7 +215,7 @@ async fn derive_deposits(
         for l in r.logs.iter() {
             let curr_index = global_index;
             global_index += 1;
-            if l.data.topics().first().is_none_or(|i| *i != DEPOSIT_EVENT_ABI_HASH) {
+            if l.data.topics().first().map_or(true, |i| *i != DEPOSIT_EVENT_ABI_HASH) {
                 continue;
             }
             if l.address != deposit_contract {
diff --git a/crates/derive/src/stages/batch/batch_validator.rs b/crates/derive/src/stages/batch/batch_validator.rs
index ad65c0214..4a5dd6241 100644
--- a/crates/derive/src/stages/batch/batch_validator.rs
+++ b/crates/derive/src/stages/batch/batch_validator.rs
@@ -1,3 +1,4 @@
+#![allow(clippy::unnecessary_map_or)]
 //! Contains the [BatchValidator] stage.
 
 use super::NextBatchProvider;
@@ -55,7 +56,7 @@ where
     /// ## Returns
     /// - `true` if the origin is behind the parent origin.
     fn origin_behind(&self, parent: &L2BlockInfo) -> bool {
-        self.prev.origin().is_none_or(|origin| origin.number < parent.l1_origin.number)
+        self.prev.origin().map_or(true, |origin| origin.number < parent.l1_origin.number)
     }
 
     /// Updates the [BatchValidator]'s view of the L1 origin blocks.