diff --git a/semgrep_output_v1.atd b/semgrep_output_v1.atd
index 26365ab..308ec4c 100644
--- a/semgrep_output_v1.atd
+++ b/semgrep_output_v1.atd
@@ -1932,7 +1932,7 @@ type lockfile_kind
 ] <ocaml repr="classic">
 
 type manifest_kind 
-  <ocaml attr="deriving show, eq, yojson">
+  <ocaml attr="deriving show, eq">
   <python decorator="dataclass(frozen=True)">   = [
   | RequirementsIn
     (* A Pip Requirements.in in file, which follows the format of requirements.txt - https://pip.pypa.io/en/stable/reference/requirements-file-format/ *)
diff --git a/semgrep_output_v1_j.ml b/semgrep_output_v1_j.ml
index 149b8aa..b4f6ace 100644
--- a/semgrep_output_v1_j.ml
+++ b/semgrep_output_v1_j.ml
@@ -229,8 +229,7 @@ type tag = Semgrep_output_v1_t.tag
 type resolution_method = Semgrep_output_v1_t.resolution_method
   [@@deriving show]
 
-type manifest_kind = Semgrep_output_v1_t.manifest_kind
-  [@@deriving show, eq, yojson]
+type manifest_kind = Semgrep_output_v1_t.manifest_kind [@@deriving show, eq]
 
 type lockfile_kind = Semgrep_output_v1_t.lockfile_kind = 
     PipRequirementsTxt | PoetryLock | PipfileLock | UvLock
diff --git a/semgrep_output_v1_j.mli b/semgrep_output_v1_j.mli
index 7effeeb..a3eea3c 100644
--- a/semgrep_output_v1_j.mli
+++ b/semgrep_output_v1_j.mli
@@ -229,8 +229,7 @@ type tag = Semgrep_output_v1_t.tag
 type resolution_method = Semgrep_output_v1_t.resolution_method
   [@@deriving show]
 
-type manifest_kind = Semgrep_output_v1_t.manifest_kind
-  [@@deriving show, eq, yojson]
+type manifest_kind = Semgrep_output_v1_t.manifest_kind [@@deriving show, eq]
 
 type lockfile_kind = Semgrep_output_v1_t.lockfile_kind = 
     PipRequirementsTxt | PoetryLock | PipfileLock | UvLock