diff --git a/.github/workflows/build-and-push.yml b/.github/workflows/build-and-push.yml
index 47eda7ac..fb9be897 100644
--- a/.github/workflows/build-and-push.yml
+++ b/.github/workflows/build-and-push.yml
@@ -6,25 +6,27 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - name: Install latest nightly
+      - name: Install compatible nightly toolchain
         uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
-          toolchain: nightly
+          toolchain: nightly-2023-02-07
           target: x86_64-unknown-linux-gnu
           components: rustfmt, clippy
 
       - name: Install dependencies
         run: |
-          rustup target add wasm32-unknown-unknown --toolchain nightly
-          rustup component add rust-src --toolchain nightly-unknown-linux-gnu
+          rustup target add wasm32-unknown-unknown --toolchain nightly-2023-02-07
+          rustup component add rust-src --toolchain nightly-2023-02-07-unknown-linux-gnu
           sudo apt-get install binaryen
-          cargo install cargo-contract --version ^0.14 --force --locked
+          cargo install cargo-dylint
+          cargo install dylint-link
+          cargo install cargo-contract --version 1.5.0 --force --locked
       - name: Run tests
         run: |
-          RUSTFLAGS=-Awarnings cargo test
+          RUSTFLAGS=-Awarnings cargo +nightly-2023-02-07 test
       - name: Build contract
         run: |
-          cargo contract build --release --manifest-path bucket/Cargo.toml
+          cargo +nightly-2023-02-07 contract build --release --manifest-path bucket/Cargo.toml
       - name: Create names linked to commit
         run: |
           ddc_contract_name=ddc.${GITHUB_SHA:0:7}.contract
diff --git a/bucket/ddc_bucket/bucket/entity.rs b/bucket/ddc_bucket/bucket/entity.rs
index f8bdc589..00335ac9 100644
--- a/bucket/ddc_bucket/bucket/entity.rs
+++ b/bucket/ddc_bucket/bucket/entity.rs
@@ -26,6 +26,8 @@ pub struct Bucket {
     pub resource_consumption_cap: Resource, 
 }
 
+// https://use.ink/3.x/ink-vs-solidity#nested-mappings--custom--advanced-structures
+#[allow(unconditional_recursion)]
 impl ink_storage::traits::PackedAllocate for Bucket {
     fn allocate_packed(&mut self, at: &Key) {
         PackedAllocate::allocate_packed(&mut *self, at)
diff --git a/bucket/ddc_bucket/cdn_cluster/entity.rs b/bucket/ddc_bucket/cdn_cluster/entity.rs
index a1d23dab..8b12f810 100644
--- a/bucket/ddc_bucket/cdn_cluster/entity.rs
+++ b/bucket/ddc_bucket/cdn_cluster/entity.rs
@@ -25,6 +25,8 @@ pub struct CdnCluster {
     pub usd_per_gb: Balance,
 }
 
+// https://use.ink/3.x/ink-vs-solidity#nested-mappings--custom--advanced-structures
+#[allow(unconditional_recursion)]
 impl ink_storage::traits::PackedAllocate for CdnCluster {
     fn allocate_packed(&mut self, at: &Key) {
         PackedAllocate::allocate_packed(&mut *self, at)
diff --git a/bucket/ddc_bucket/cdn_node/entity.rs b/bucket/ddc_bucket/cdn_node/entity.rs
index 578e2ac9..32584cb7 100644
--- a/bucket/ddc_bucket/cdn_node/entity.rs
+++ b/bucket/ddc_bucket/cdn_node/entity.rs
@@ -17,6 +17,8 @@ pub struct CdnNode {
     pub undistributed_payment: Balance,
 }
 
+// https://use.ink/3.x/ink-vs-solidity#nested-mappings--custom--advanced-structures
+#[allow(unconditional_recursion)]
 impl ink_storage::traits::PackedAllocate for CdnNode {
     fn allocate_packed(&mut self, at: &Key) {
         PackedAllocate::allocate_packed(&mut *self, at)
diff --git a/bucket/ddc_bucket/cluster/entity.rs b/bucket/ddc_bucket/cluster/entity.rs
index 84cd6d3b..35e435d9 100644
--- a/bucket/ddc_bucket/cluster/entity.rs
+++ b/bucket/ddc_bucket/cluster/entity.rs
@@ -29,6 +29,8 @@ pub struct Cluster {
     pub total_rent: Balance,
 }
 
+// https://use.ink/3.x/ink-vs-solidity#nested-mappings--custom--advanced-structures
+#[allow(unconditional_recursion)]
 impl ink_storage::traits::PackedAllocate for Cluster {
     fn allocate_packed(&mut self, at: &Key) {
         PackedAllocate::allocate_packed(&mut *self, at)
diff --git a/bucket/ddc_bucket/node/entity.rs b/bucket/ddc_bucket/node/entity.rs
index 75efa26d..b7f5a8a8 100644
--- a/bucket/ddc_bucket/node/entity.rs
+++ b/bucket/ddc_bucket/node/entity.rs
@@ -22,6 +22,8 @@ pub struct Node {
     pub node_tag: NodeTag,
 }
 
+// https://use.ink/3.x/ink-vs-solidity#nested-mappings--custom--advanced-structures
+#[allow(unconditional_recursion)]
 impl ink_storage::traits::PackedAllocate for Node {
     fn allocate_packed(&mut self, at: &Key) {
         PackedAllocate::allocate_packed(&mut *self, at)