diff --git a/src/MyWebLog.Data/PostgresData.fs b/src/MyWebLog.Data/PostgresData.fs
index b35ec62..b332065 100644
--- a/src/MyWebLog.Data/PostgresData.fs
+++ b/src/MyWebLog.Data/PostgresData.fs
@@ -14,11 +14,7 @@ type PostgresData(log: ILogger<PostgresData>, ser: JsonSerializer) =
     /// Create any needed tables
     let ensureTables () = backgroundTask {
         // Set up the PostgreSQL document store
-        Configuration.useSerializer
-            { new IDocumentSerializer with
-                member _.Serialize<'T>(it: 'T) : string = Utils.serialize ser it
-                member _.Deserialize<'T>(it: string) : 'T = Utils.deserialize ser it
-            }
+        Configuration.useSerializer (Utils.createDocumentSerializer ser)
         
         let! tables =
             Custom.list "SELECT tablename FROM pg_tables WHERE schemaname = 'public'" []
diff --git a/src/MyWebLog.Data/SQLiteData.fs b/src/MyWebLog.Data/SQLiteData.fs
index e312395..80b1ac4 100644
--- a/src/MyWebLog.Data/SQLiteData.fs
+++ b/src/MyWebLog.Data/SQLiteData.fs
@@ -15,7 +15,9 @@ type SQLiteData(conn: SqliteConnection, log: ILogger<SQLiteData>, ser: JsonSeria
     
     /// Create tables (and their associated indexes) if they do not exist
     let ensureTables () = backgroundTask {
-
+        
+        Configuration.useSerializer (Utils.createDocumentSerializer ser)
+        
         let! tables = conn.customList<string> "SELECT name FROM sqlite_master WHERE type = 'table'" [] _.GetString(0)
         
         let needsTable table =
diff --git a/src/MyWebLog.Data/Utils.fs b/src/MyWebLog.Data/Utils.fs
index f26ff02..228cb97 100644
--- a/src/MyWebLog.Data/Utils.fs
+++ b/src/MyWebLog.Data/Utils.fs
@@ -50,6 +50,16 @@ let serialize<'T> ser (item: 'T) =
 let deserialize<'T> (ser: JsonSerializer) value =
     JsonConvert.DeserializeObject<'T>(value, Json.settings ser)
 
+open BitBadger.Documents
+
+/// Create a document serializer using the given JsonSerializer
+let createDocumentSerializer ser =
+    { new IDocumentSerializer with
+        member _.Serialize<'T>(it: 'T) : string = serialize ser it
+        member _.Deserialize<'T>(it: string) : 'T = deserialize ser it
+    }
+
+
 open Microsoft.Extensions.Logging
 
 /// Log a migration step