diff --git a/Package.resolved b/Package.resolved
index a192e0c6..cc9b932b 100644
--- a/Package.resolved
+++ b/Package.resolved
@@ -1,5 +1,5 @@
 {
-  "originHash" : "2b95f254bb904411c5a0aba0e0402c157014542e9bd40eb5848c42c8598b80a9",
+  "originHash" : "1464a33ec5d6d5bf475cc815fedb831aec3a52c5f5d911bd6ccdf4b14db73807",
   "pins" : [
     {
       "identity" : "combine-schedulers",
diff --git a/Package.swift b/Package.swift
index e1f278e8..e42498da 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,5 +1,4 @@
 // swift-tools-version: 6.1
-
 import PackageDescription
 
 let package = Package(
@@ -21,14 +20,31 @@ let package = Package(
     ),
   ],
   traits: [
+    .default(enabledTraits: ["GRDB"]),
+    .trait(
+      name: "GRDB",
+      description: "Use the standard GRDB package."
+    ),
     .trait(
       name: "SQLiteDataTagged",
       description: "Introduce SQLiteData conformances to the swift-tagged package."
+    ),
+    .trait(
+      name: "GRDBCIPHER",
+      description: "Use the SQLCipher-backed GRDB package."
     )
   ],
   dependencies: [
     .package(url: "https://github.com/apple/swift-collections", from: "1.0.0"),
     .package(url: "https://github.com/groue/GRDB.swift", from: "7.6.0"),
+    .package(
+      url: "https://github.com/swift-everywhere/grdb-sqlcipher.git",
+      from: "7.5.0",
+      traits: [
+        .trait(name: "GRDBCIPHER", condition: .when(traits: ["GRDBCIPHER"]))
+      ]
+    ),
+    .package(url: "https://github.com/skiptools/swift-sqlcipher.git", from: "1.3.0"),
     .package(url: "https://github.com/pointfreeco/swift-concurrency-extras", from: "1.0.0"),
     .package(url: "https://github.com/pointfreeco/swift-custom-dump", from: "1.3.3"),
     .package(url: "https://github.com/pointfreeco/swift-dependencies", from: "1.9.0"),
@@ -51,11 +67,25 @@ let package = Package(
       dependencies: [
         .product(name: "ConcurrencyExtras", package: "swift-concurrency-extras"),
         .product(name: "Dependencies", package: "swift-dependencies"),
-        .product(name: "GRDB", package: "GRDB.swift"),
+        .product(
+          name: "GRDB",
+          package: "GRDB.swift",
+          condition: .when(traits: ["GRDB"])
+        ),
+        .product(
+          name: "GRDB",
+          package: "grdb-sqlcipher",
+          condition: .when(traits: ["GRDBCIPHER"])
+        ),
         .product(name: "IssueReporting", package: "xctest-dynamic-overlay"),
         .product(name: "OrderedCollections", package: "swift-collections"),
         .product(name: "Perception", package: "swift-perception"),
         .product(name: "Sharing", package: "swift-sharing"),
+        .product(
+          name: "SQLCipher",
+          package: "swift-sqlcipher",
+          condition: .when(traits: ["GRDBCIPHER"])
+        ),
         .product(name: "StructuredQueriesSQLite", package: "swift-structured-queries"),
         .product(
           name: "Tagged",
diff --git a/Sources/SQLiteData/CloudKit/Internal/UserDatabase.swift b/Sources/SQLiteData/CloudKit/Internal/UserDatabase.swift
index b0fb5edc..5f0f2f13 100644
--- a/Sources/SQLiteData/CloudKit/Internal/UserDatabase.swift
+++ b/Sources/SQLiteData/CloudKit/Internal/UserDatabase.swift
@@ -16,7 +16,7 @@
     }
 
     package func write<T: Sendable>(
-      _ updates: @Sendable (Database) throws -> T
+      _ updates: @escaping @Sendable (Database) throws -> T
     ) async throws -> T {
       try await database.write { db in
         try $_isSynchronizingChanges.withValue(true) {
@@ -26,7 +26,7 @@
     }
 
     package func read<T: Sendable>(
-      _ updates: @Sendable (Database) throws -> T
+      _ updates: @escaping @Sendable (Database) throws -> T
     ) async throws -> T {
       try await database.read { db in
         try updates(db)
diff --git a/Sources/SQLiteData/CloudKit/SyncEngine.swift b/Sources/SQLiteData/CloudKit/SyncEngine.swift
index 871c7999..871955be 100644
--- a/Sources/SQLiteData/CloudKit/SyncEngine.swift
+++ b/Sources/SQLiteData/CloudKit/SyncEngine.swift
@@ -756,7 +756,7 @@
       try tearDownSyncEngine()
       await withErrorReporting(.sqliteDataCloudKitFailure) {
         try await userDatabase.write { db in
-          for table in tables {
+          for table in self.tables {
             func open<T>(_: some SynchronizableTable<T>) {
               withErrorReporting(.sqliteDataCloudKitFailure) {
                 try T.delete().execute(db)
@@ -764,7 +764,7 @@
             }
             open(table)
           }
-          try setUpSyncEngine(writableDB: db)
+          try self.setUpSyncEngine(writableDB: db)
         }
       }
       try await start()
@@ -1591,7 +1591,7 @@
               if let share = record as? CKShare {
                 shares.append(.share(share))
               } else {
-                upsertFromServerRecord(record, db: db)
+                self.upsertFromServerRecord(record, db: db)
                 if let shareReference = record.share {
                   shares.append(.reference(shareReference))
                 }
@@ -1893,7 +1893,7 @@
     ) async {
       await withErrorReporting(.sqliteDataCloudKitFailure) {
         try await userDatabase.write { db in
-          upsertFromServerRecord(serverRecord, force: force, db: db)
+          self.upsertFromServerRecord(serverRecord, force: force, db: db)
         }
       }
     }
diff --git a/Sources/SQLiteData/StructuredQueries+GRDB/CustomFunctions.swift b/Sources/SQLiteData/StructuredQueries+GRDB/CustomFunctions.swift
index b9defb55..18b03440 100644
--- a/Sources/SQLiteData/StructuredQueries+GRDB/CustomFunctions.swift
+++ b/Sources/SQLiteData/StructuredQueries+GRDB/CustomFunctions.swift
@@ -1,5 +1,9 @@
 import Foundation
+#if GRDBCIPHER
+import SQLCipher
+#else
 import GRDBSQLite
+#endif
 
 extension Database {
   /// Adds a user-defined scalar `@DatabaseFunction` to a connection.
diff --git a/Sources/SQLiteData/StructuredQueries+GRDB/QueryCursor.swift b/Sources/SQLiteData/StructuredQueries+GRDB/QueryCursor.swift
index 286135e8..30ed9103 100644
--- a/Sources/SQLiteData/StructuredQueries+GRDB/QueryCursor.swift
+++ b/Sources/SQLiteData/StructuredQueries+GRDB/QueryCursor.swift
@@ -1,6 +1,10 @@
 import Foundation
 import GRDB
+#if GRDBCIPHER
+import SQLCipher
+#else
 import GRDBSQLite
+#endif
 import StructuredQueriesCore
 
 /// A cursor of a structured query.
diff --git a/Sources/SQLiteData/StructuredQueries+GRDB/SQLiteFunctionDecoder.swift b/Sources/SQLiteData/StructuredQueries+GRDB/SQLiteFunctionDecoder.swift
index fc96760e..d45ddd63 100644
--- a/Sources/SQLiteData/StructuredQueries+GRDB/SQLiteFunctionDecoder.swift
+++ b/Sources/SQLiteData/StructuredQueries+GRDB/SQLiteFunctionDecoder.swift
@@ -1,5 +1,9 @@
 import Foundation
+#if GRDBCIPHER
+import SQLCipher
+#else
 import GRDBSQLite
+#endif
 import StructuredQueriesCore
 
 @usableFromInline
diff --git a/Sources/SQLiteData/StructuredQueries+GRDB/SQLiteQueryDecoder.swift b/Sources/SQLiteData/StructuredQueries+GRDB/SQLiteQueryDecoder.swift
index 4aed866e..7245910d 100644
--- a/Sources/SQLiteData/StructuredQueries+GRDB/SQLiteQueryDecoder.swift
+++ b/Sources/SQLiteData/StructuredQueries+GRDB/SQLiteQueryDecoder.swift
@@ -1,5 +1,9 @@
 import Foundation
+#if GRDBCIPHER
+import SQLCipher
+#else
 import GRDBSQLite
+#endif
 import StructuredQueriesCore
 
 @usableFromInline