diff --git a/.changeset/many-donkeys-teach.md b/.changeset/many-donkeys-teach.md
new file mode 100644
index 000000000..ad7b93cd5
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+++ b/.changeset/many-donkeys-teach.md
@@ -0,0 +1,6 @@
+---
+"postgraphile": patch
+"@dataplan/pg": patch
+---
+
+Fix accidental double-encoding of values on their way to postgres.