diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 849b7217..93e7bdee 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.7.39
+current_version = 0.7.40
 commit = True
 tag = True
 tag_name = {new_version}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 98d3dd23..7b832b9f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -202,4 +202,10 @@ Add max confidence interval multiplier to oracle validity calculations
 
 ## [0.7.39] - 2024-3-13
 
-Fix events archiver bug with logs less than 8 bytes
\ No newline at end of file
+Fix events archiver bug with logs less than 8 bytes
+
+## [0.7.40] - 2024-3-14
+
+Update `drift.json` IDL
+
+Fix enum interpretaton bug in `get_max_confidence_interval_multiplier`
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index 6f71f50b..58b244b8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "driftpy"
-version = "0.7.39"
+version = "0.7.40"
 description = "A Python client for the Drift DEX"
 authors = ["x19 <https://twitter.com/0xNineteen@gmail.com>", "bigz <https://twitter.com/bigz_pubkey>", "frank <https://twitter.com/soundsonacid>"]
 license = "MIT"
diff --git a/src/driftpy/__init__.py b/src/driftpy/__init__.py
index 58f75979..9cbc96b8 100644
--- a/src/driftpy/__init__.py
+++ b/src/driftpy/__init__.py
@@ -1 +1 @@
-__version__ = "0.7.39"
+__version__ = "0.7.40"
diff --git a/src/driftpy/idl/drift.json b/src/driftpy/idl/drift.json
index 627cdec1..9a439ad4 100644
--- a/src/driftpy/idl/drift.json
+++ b/src/driftpy/idl/drift.json
@@ -1,5 +1,5 @@
 {
-  "version": "2.70.0",
+  "version": "2.72.0",
   "name": "drift",
   "instructions": [
     {
@@ -3336,6 +3336,32 @@
         }
       ]
     },
+    {
+      "name": "updatePerpMarketFundingPeriod",
+      "accounts": [
+        {
+          "name": "admin",
+          "isMut": false,
+          "isSigner": true
+        },
+        {
+          "name": "state",
+          "isMut": false,
+          "isSigner": false
+        },
+        {
+          "name": "perpMarket",
+          "isMut": true,
+          "isSigner": false
+        }
+      ],
+      "args": [
+        {
+          "name": "fundingPeriod",
+          "type": "i64"
+        }
+      ]
+    },
     {
       "name": "updatePerpMarketMaxImbalances",
       "accounts": [
@@ -4967,6 +4993,11 @@
           "isMut": true,
           "isSigner": false
         },
+        {
+          "name": "perpMarket",
+          "isMut": true,
+          "isSigner": false
+        },
         {
           "name": "state",
           "isMut": false,
@@ -4981,6 +5012,37 @@
           }
         }
       ]
+    },
+    {
+      "name": "deletePrelaunchOracle",
+      "accounts": [
+        {
+          "name": "admin",
+          "isMut": true,
+          "isSigner": true
+        },
+        {
+          "name": "prelaunchOracle",
+          "isMut": true,
+          "isSigner": false
+        },
+        {
+          "name": "perpMarket",
+          "isMut": false,
+          "isSigner": false
+        },
+        {
+          "name": "state",
+          "isMut": false,
+          "isSigner": false
+        }
+      ],
+      "args": [
+        {
+          "name": "perpMarketIndex",
+          "type": "u16"
+        }
+      ]
     }
   ],
   "accounts": [
@@ -8560,6 +8622,9 @@
           },
           {
             "name": "UpdateAMMCurve"
+          },
+          {
+            "name": "OracleOrderPrice"
           }
         ]
       }
diff --git a/src/driftpy/math/oracles.py b/src/driftpy/math/oracles.py
index 54c5f104..76625060 100644
--- a/src/driftpy/math/oracles.py
+++ b/src/driftpy/math/oracles.py
@@ -104,8 +104,12 @@ def is_oracle_valid(
 
     is_oracle_price_too_volatile = lhs or rhs
 
+    print(market.contract_tier)
     max_confidence_multiplier = get_max_confidence_interval_multiplier(market)
 
+    print(oracle_guard_rails.validity.confidence_interval_max_size)
+    print(max_confidence_multiplier)
+
     is_confidence_too_large = (
         (max(1, oracle_price_data.confidence) * BID_ASK_SPREAD_PRECISION)
         // oracle_price_data.price
@@ -128,14 +132,13 @@ def is_oracle_valid(
 
 
 def get_max_confidence_interval_multiplier(market: PerpMarketAccount) -> int:
-    match market.contract_tier:
-        case ContractTier.A():
-            return 1
-        case ContractTier.B():
-            return 1
-        case ContractTier.C():
-            return 2
-        case ContractTier.Speculative():
-            return 10
-        case ContractTier.Isolated():
-            return 50
+    if str(market.contract_tier) == "ContractTier.A()":
+        return 1
+    elif str(market.contract_tier) == "ContractTier.B()":
+        return 1
+    elif str(market.contract_tier) == "ContractTier.C()":
+        return 2
+    elif str(market.contract_tier) == "ContractTier.Speculative()":
+        return 10
+    elif str(market.contract_tier) == "ContractTier.Isolated()":
+        return 50