diff --git a/Cargo.toml b/Cargo.toml
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,4 +18,4 @@
 ]
 
 [workspace.package]
-rust-version = "1.72.0"
+rust-version = "1.76.0"
diff --git a/chronik/CMakeLists.txt b/chronik/CMakeLists.txt
--- a/chronik/CMakeLists.txt
+++ b/chronik/CMakeLists.txt
@@ -11,10 +11,11 @@
 )
 FetchContent_MakeAvailable(Corrosion)
 
-set(REQUIRED_RUST_VERSION "1.72.0")
+set(REQUIRED_RUST_VERSION "1.76.0")
 if(Rust_VERSION VERSION_LESS REQUIRED_RUST_VERSION)
     message(FATAL_ERROR "Minimum required Rust version is "
-            "${REQUIRED_RUST_VERSION}, but found ${Rust_VERSION}")
+            "${REQUIRED_RUST_VERSION}, but found ${Rust_VERSION}. "
+            "Use `rustup update stable` to update.")
 endif()
 
 set(CARGO_BUILD_DIR "${CMAKE_BINARY_DIR}/cargo/build")
diff --git a/chronik/bitcoinsuite-slp/src/color.rs b/chronik/bitcoinsuite-slp/src/color.rs
--- a/chronik/bitcoinsuite-slp/src/color.rs
+++ b/chronik/bitcoinsuite-slp/src/color.rs
@@ -192,7 +192,7 @@
 impl ColoredTx {
     /// Parse the OP_RETURN of the tx and color its outputs
     pub fn color_tx(tx: &Tx) -> Option<ColoredTx> {
-        let op_return = match tx.outputs.get(0) {
+        let op_return = match tx.outputs.first() {
             Some(output) if output.script.is_opreturn() => &output.script,
             _ => return None,
         };
diff --git a/chronik/bitcoinsuite-slp/src/verify.rs b/chronik/bitcoinsuite-slp/src/verify.rs
--- a/chronik/bitcoinsuite-slp/src/verify.rs
+++ b/chronik/bitcoinsuite-slp/src/verify.rs
@@ -234,7 +234,7 @@
                 if section.meta.token_type
                     == TokenType::Slp(SlpTokenType::Nft1Child) =>
             {
-                match self.spent_tokens.get(0) {
+                match self.spent_tokens.first() {
                     Some(Some(spent_token))
                         if spent_token.token.meta.token_type
                             == TokenType::Slp(SlpTokenType::Nft1Group)
diff --git a/chronik/chronik-db/src/io/spent_by.rs b/chronik/chronik-db/src/io/spent_by.rs
--- a/chronik/chronik-db/src/io/spent_by.rs
+++ b/chronik/chronik-db/src/io/spent_by.rs
@@ -230,10 +230,7 @@
                     tx_num: tx.tx_num,
                     input_idx: input_idx as u32,
                 };
-                spent_by_map
-                    .entry(input_tx_num)
-                    .or_insert(vec![])
-                    .push(spent_by);
+                spent_by_map.entry(input_tx_num).or_default().push(spent_by);
             }
         }
         for (tx_num, entries) in spent_by_map {
diff --git a/chronik/chronik-db/src/io/token/batch.rs b/chronik/chronik-db/src/io/token/batch.rs
--- a/chronik/chronik-db/src/io/token/batch.rs
+++ b/chronik/chronik-db/src/io/token/batch.rs
@@ -212,7 +212,7 @@
         }
 
         // Add new tokens from GENESIS txs
-        if let Some(entry) = valid_tx.entries.get(0) {
+        if let Some(entry) = valid_tx.entries.first() {
             // Skip invalid GENESIS txs
             if !entry.is_invalid {
                 if let Some(info) = &entry.genesis_info {
@@ -255,7 +255,7 @@
 
         let mut flags = 0;
         if is_mint_vault_mint {
-            let first_entry = valid_tx.entries.get(0);
+            let first_entry = valid_tx.entries.first();
             let has_mint_vault =
                 first_entry.map_or(false, |entry| !entry.is_invalid);
             if has_mint_vault {
diff --git a/contrib/gitian-descriptors/gitian-linux.yml b/contrib/gitian-descriptors/gitian-linux.yml
--- a/contrib/gitian-descriptors/gitian-linux.yml
+++ b/contrib/gitian-descriptors/gitian-linux.yml
@@ -177,7 +177,7 @@
   curl -sSf https://static.rust-lang.org/rustup/archive/1.26.0/x86_64-unknown-linux-gnu/rustup-init -o rustup-init
   echo "0b2f6c8f85a3d02fde2efc0ced4657869d73fccfce59defb4e8d29233116e6db rustup-init" | sha256sum -c
   chmod +x rustup-init
-  ./rustup-init -y --default-toolchain=1.72.0
+  ./rustup-init -y --default-toolchain=1.76.0
 
   # Rust target name differs from our host name, let's map
   declare -A RUST_TARGET
diff --git a/contrib/utils/install-dependencies-bullseye.sh b/contrib/utils/install-dependencies-bullseye.sh
--- a/contrib/utils/install-dependencies-bullseye.sh
+++ b/contrib/utils/install-dependencies-bullseye.sh
@@ -167,11 +167,11 @@
 # Install nyc for mocha unit test reporting
 npm i -g nyc
 
-# Install Rust stable 1.72.0 and nightly from the 2023-12-29
+# Install Rust stable 1.76.0 and nightly from the 2023-12-29
 curl -sSf https://static.rust-lang.org/rustup/archive/1.26.0/x86_64-unknown-linux-gnu/rustup-init -o rustup-init
 echo "0b2f6c8f85a3d02fde2efc0ced4657869d73fccfce59defb4e8d29233116e6db rustup-init" | sha256sum -c
 chmod +x rustup-init
-./rustup-init -y --default-toolchain=1.72.0
+./rustup-init -y --default-toolchain=1.76.0
 RUST_HOME="${HOME}/.cargo/bin"
 RUST_NIGHTLY_DATE=2023-12-29
 "${RUST_HOME}/rustup" install nightly-${RUST_NIGHTLY_DATE}