diff --git a/src/sqlalchemy_cratedb/compiler.py b/src/sqlalchemy_cratedb/compiler.py
index d9e3bb7..2ba1394 100644
--- a/src/sqlalchemy_cratedb/compiler.py
+++ b/src/sqlalchemy_cratedb/compiler.py
@@ -245,6 +245,12 @@ def visit_FLOAT_VECTOR(self, type_, **kw):
             raise ValueError("FloatVector must be initialized with dimension size")
         return f"FLOAT_VECTOR({dimensions})"
 
+    def visit_JSON(self, type_, **kw):
+        return "OBJECT"
+
+    def visit_JSONB(self, type_, **kw):
+        return "OBJECT"
+
 
 class CrateCompiler(compiler.SQLCompiler):