diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 5135c9ca6..7c576e483 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -25,7 +25,7 @@ jobs:
               AS_DEPENDENCY: true
               DO_NO_STD: true
               DO_DOCS: true
-          - rust: 1.41.1
+          - rust: 1.65.0
             env:
               AS_DEPENDENCY: true
     steps:
@@ -41,27 +41,6 @@ jobs:
         env: ${{ matrix.env }}
         run: ./contrib/test.sh
 
-  Arch32bit:
-    name: Testing 32-bit version
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout Crate
-        uses: actions/checkout@v2
-      - name: Checkout Toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: stable
-          override: true
-      - name: Add architecture i386
-        run: sudo dpkg --add-architecture i386
-      - name: Install i686 gcc
-        run: sudo apt-get update -y && sudo apt-get install -y gcc-multilib
-      - name: Install target
-        run: rustup target add i686-unknown-linux-gnu
-      - name: Run test on i686
-        run: cargo test --target i686-unknown-linux-gnu
-
   Cross:
     name: Cross testing
     if: ${{ !github.event.act }}
diff --git a/src/ephemerealdata/instant_lock.rs b/src/ephemerealdata/instant_lock.rs
index 474caade7..652100b16 100644
--- a/src/ephemerealdata/instant_lock.rs
+++ b/src/ephemerealdata/instant_lock.rs
@@ -14,6 +14,10 @@ use blockdata::transaction::outpoint::OutPoint;
 //#[cfg(feature = "use-serde")]
 //use serde_big_array::BigArray;
 
+type BlsSignature = [u8; 96];
+
+type CycleHash = [u8; 32];
+
 #[derive(Clone, Eq, PartialEq)]
 // #[cfg_attr(feature = "use-serde", derive(Serialize, Deserialize))]
 /// Instant send lock is a mechanism used by the Dash network to
@@ -27,11 +31,11 @@ pub struct InstantLock {
     /// Transaction hash locked by this lock
     pub txid: Txid,
     /// Hash to figure out which quorum was used to sign this IS lock
-    pub cyclehash: [u8; 32],
+    pub cyclehash: CycleHash,
     /// Quorum signature for this IS lock
     //#[cfg_attr(feature = "use-serde", serde(serialize_with = "<[_]>::serialize"))]
     //#[cfg_attr(feature = "use-serde", serde(with = "BigArray"))]
-    pub signature: [u8; 96],
+    pub signature: BlsSignature,
 }
 
 impl Default for InstantLock {