diff --git a/bson/src/commonMain/kotlin/types/BsonType.kt b/bson/src/commonMain/kotlin/types/BsonType.kt
new file mode 100644
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+++ b/bson/src/commonMain/kotlin/types/BsonType.kt
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2024, OpenSavvy, MongoDB Inc and contributors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package opensavvy.ktmongo.bson.types
+
+import opensavvy.ktmongo.bson.DEPRECATED_IN_BSON_SPEC
+
+/**
+ * The different data types supported in BSON documents.
+ *
+ * ### External resources
+ *
+ * - [BSON spec](https://bsonspec.org/spec.html)
+ */
+enum class BsonType(val code: Byte) {
+	Double(1),
+
+	String(2),
+
+	Document(3),
+
+	Array(4),
+
+	BinaryData(5),
+
+	@Deprecated(DEPRECATED_IN_BSON_SPEC)
+	Undefined(6),
+
+	ObjectId(7),
+
+	Boolean(8),
+
+	Datetime(9),
+
+	Null(10),
+
+	RegExp(11),
+
+	@Deprecated(DEPRECATED_IN_BSON_SPEC)
+	DBPointer(12),
+
+	JavaScript(13),
+
+	@Deprecated(DEPRECATED_IN_BSON_SPEC)
+	Symbol(14),
+
+	@Deprecated(DEPRECATED_IN_BSON_SPEC)
+	JavaScriptWithScope(15),
+
+	Int32(16),
+
+	Timestamp(17),
+
+	Int64(18),
+
+	Decimal128(19),
+
+	MinKey(-1),
+
+	MaxKey(127)
+}