diff --git a/bin/dfx-sns-wasm-download b/bin/dfx-sns-wasm-download
index d180cc1b..1bf1c890 100755
--- a/bin/dfx-sns-wasm-download
+++ b/bin/dfx-sns-wasm-download
@@ -16,5 +16,5 @@ export DFX_IC_COMMIT
 
 if [[ "${1:-wasms}" == "wasms" ]]; then
   mkdir -p wasms
-  jq <"$SOURCE_DIR/sns_dfx.json" -r '.canisters | to_entries | map({url: "https://download.dfinity.systems/ic/\(env.DFX_IC_COMMIT)/canisters/\(.value.wasm).gz", file: "wasms/\(.value.wasm)"}) | map ("curl -L --fail \(.url) | gunzip > \(.file)") | .[]' | xargs -I{} bash -xc '{}'
+  jq <"$SOURCE_DIR/sns_dfx.json" -r '.canisters | to_entries | map({url: "https://download.dfinity.systems/ic/\(env.DFX_IC_COMMIT)/canisters/\(.value.wasm)", file: "wasms/\(.value.wasm)"}) | map ("curl -L --fail \(.url) > \(.file)") | .[]' | xargs -I{} bash -xc '{}'
 fi
diff --git a/bin/sns_dfx.json b/bin/sns_dfx.json
index 27fb4391..aa770c40 100644
--- a/bin/sns_dfx.json
+++ b/bin/sns_dfx.json
@@ -5,7 +5,7 @@
             "nns_sns_wasm_name": "governance"
         },
         "build": "",
-        "wasm": "sns-governance-canister_test.wasm",
+        "wasm": "sns-governance-canister_test.wasm.gz",
         "candid": "../governance/canister/governance.did",
         "type": "custom"
       },
@@ -14,7 +14,7 @@
             "nns_sns_wasm_name": "index"
         },
         "build": "",
-        "wasm": "ic-icrc1-index-ng.wasm",
+        "wasm": "ic-icrc1-index-ng.wasm.gz",
         "candid": "../../rosetta-api/icrc1/index-ng/index-ng.did",
         "type": "custom"
       },
@@ -23,7 +23,7 @@
             "nns_sns_wasm_name": "ledger"
         },
         "build": "",
-        "wasm": "ic-icrc1-ledger.wasm",
+        "wasm": "ic-icrc1-ledger.wasm.gz",
         "candid": "../../rosetta-api/icrc1/ledger/icrc1.did",
         "type": "custom"
       },
@@ -32,7 +32,7 @@
             "nns_sns_wasm_name": "archive"
         },
         "build": "",
-        "wasm": "ic-icrc1-archive.wasm",
+        "wasm": "ic-icrc1-archive.wasm.gz",
         "candid": "../swap/canister/swap.did",
         "type": "custom"
       },
@@ -41,7 +41,7 @@
             "nns_sns_wasm_name": "root"
         },
         "build": "",
-        "wasm": "sns-root-canister.wasm",
+        "wasm": "sns-root-canister.wasm.gz",
         "candid": "../root/canister/root.did",
         "type": "custom"
       },
@@ -50,7 +50,7 @@
             "nns_sns_wasm_name": "swap"
         },
         "build": "",
-        "wasm": "sns-swap-canister.wasm",
+        "wasm": "sns-swap-canister.wasm.gz",
         "candid": "../swap/canister/swap.did",
         "type": "custom"
       }