diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c30feedda..6a19fa501 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -23,7 +23,7 @@ jobs:
 
       - name: Download Dojo release artifact
         run: |
-          curl -L -o dojo-linux-x86_64.tar.gz https://github.com/dojoengine/dojo/releases/download/v0.2.2/dojo_v0.2.2_linux_amd64.tar.gz
+          curl -L -o dojo-linux-x86_64.tar.gz https://github.com/dojoengine/dojo/releases/download/v0.2.3/dojo_v0.2.3_linux_amd64.tar.gz
           tar -xzf dojo-linux-x86_64.tar.gz
           sudo mv sozo /usr/local/bin/
 
diff --git a/client/src/components/cityview/realm/labor/LaborBuild.tsx b/client/src/components/cityview/realm/labor/LaborBuild.tsx
index 411388334..49805dc6d 100644
--- a/client/src/components/cityview/realm/labor/LaborBuild.tsx
+++ b/client/src/components/cityview/realm/labor/LaborBuild.tsx
@@ -129,6 +129,7 @@ export const LaborBuildPopup = ({ resourceId, setBuildLoadingStates, onClose }:
     optimisticBuildLabor(
       nextBlockTimestamp || 0,
       costResources,
+      laborAuctionAverageCoefficient,
       buildLabor,
     )({
       signer: account,
diff --git a/client/src/dojo/createOptimisticSystemCalls.ts b/client/src/dojo/createOptimisticSystemCalls.ts
index 3d41f2d38..a660c7417 100644
--- a/client/src/dojo/createOptimisticSystemCalls.ts
+++ b/client/src/dojo/createOptimisticSystemCalls.ts
@@ -203,6 +203,7 @@ export function createOptimisticSystemCalls({
   function optimisticBuildLabor(
     ts: number,
     costResources: LaborCostInterface[],
+    laborAuctionAverageCoefficient: number,
     systemCall: (args: BuildLaborProps) => Promise<void>,
   ) {
     return async function (this: any, args: BuildLaborProps) {
@@ -217,7 +218,8 @@ export function createOptimisticSystemCalls({
           balance: 0,
         };
         let balance =
-          currentResource.balance - (laborUnits as number) * (multiplier as number) * costResources[i].amount;
+          currentResource.balance -
+          (laborUnits as number) * (multiplier as number) * costResources[i].amount * laborAuctionAverageCoefficient;
         Resource.addOverride(overrideId, {
           entity: costId,
           value: {
diff --git a/client/src/hooks/store/useBlockchainStore.tsx b/client/src/hooks/store/useBlockchainStore.tsx
index 350955193..1932fffb2 100644
--- a/client/src/hooks/store/useBlockchainStore.tsx
+++ b/client/src/hooks/store/useBlockchainStore.tsx
@@ -29,7 +29,7 @@ export const useFetchBlockchainData = () => {
 
     fetchBlockchainTimestamp(); // Initial fetch
 
-    const intervalId = setInterval(fetchBlockchainTimestamp, 5000); // Fetch every 5 seconds
+    const intervalId = setInterval(fetchBlockchainTimestamp, 10000); // Fetch every 10 seconds
 
     return () => {
       clearInterval(intervalId); // Clear interval on component unmount
@@ -58,20 +58,11 @@ const fetchBlockTimestamp = async (): Promise<number | undefined> => {
       const data = await response.json();
       return data.result;
     } else {
-      const reponse = await fetch(import.meta.env.VITE_KATANA_URL!, {
-        method: "POST",
-        headers: {
-          "Content-Type": "application/json",
-        },
-        body: JSON.stringify({
-          jsonrpc: "2.0",
-          method: "starknet_getBlockWithTxs",
-          params: { blockId: "latest" },
-          id: 1,
-        }),
-      });
-      const data = await reponse.json();
-      return data.result.timestamp;
+      // NOTE: if we are using Katana in dev, we should use next block timestmamp because
+      // it allows us to advance time. But current issue with next_block_timestamp is that
+      // it does not get updated in katana until someone mints a new block. Since in prod we should
+      // not be able to use advance time, we should use current block timestamp
+      return Date.now() / 1000;
     }
   } catch (error) {
     console.error("Error fetching block timestamp:", error);
diff --git a/contracts/Scarb.toml b/contracts/Scarb.toml
index d62b6e275..d6cc28a75 100755
--- a/contracts/Scarb.toml
+++ b/contracts/Scarb.toml
@@ -7,7 +7,7 @@ version = "0.1.0"
 sierra-replace-ids = true
 
 [dependencies]
-dojo = { git = "https://github.com/dojoengine/dojo", rev = "47c0cbcfa4ebd4d4b504ec959fdbcfd3e4271e8a" }
+dojo = { git = "https://github.com/dojoengine/dojo", tag = "v0.2.3" }
 alexandria_math = { git = "https://github.com/keep-starknet-strange/alexandria.git", rev = "e1aa42853815f04ff00e4ed3507cfd74d7b0c644" }
 cubit = { git = "https://github.com/influenceth/cubit" }
 # TODO: use dojo_defi when works with latest nightly