diff --git a/schema/methods_directory/mathematical/cg.json b/schema/methods_directory/mathematical/cg.json
index 6e817b347..e7ba26a05 100644
--- a/schema/methods_directory/mathematical/cg.json
+++ b/schema/methods_directory/mathematical/cg.json
@@ -11,5 +11,6 @@
         "categories": {
             "$ref": "../../methods_category/mathematical/opt/diff/ordern/cg.json"
         }
-    }
+    },
+    "required": ["categories"]
 }
diff --git a/schema/methods_directory/mathematical/davidson.json b/schema/methods_directory/mathematical/davidson.json
index 9eef262bc..490563d34 100644
--- a/schema/methods_directory/mathematical/davidson.json
+++ b/schema/methods_directory/mathematical/davidson.json
@@ -11,5 +11,6 @@
         "categories": {
             "$ref": "../../methods_category/mathematical/linalg/diag/davidson.json"
         }
-    }
+    },
+    "required": ["categories"]
 }
diff --git a/schema/methods_directory/mathematical/regression.json b/schema/methods_directory/mathematical/regression.json
index 407491c57..e69595ade 100644
--- a/schema/methods_directory/mathematical/regression.json
+++ b/schema/methods_directory/mathematical/regression.json
@@ -19,6 +19,7 @@
         }
     },
     "required": [
+        "categories",
         "precision",
         "data"
     ]
diff --git a/schema/methods_directory/physical/ao/dunning.json b/schema/methods_directory/physical/ao/dunning.json
index 629957a6d..e704a30e7 100644
--- a/schema/methods_directory/physical/ao/dunning.json
+++ b/schema/methods_directory/physical/ao/dunning.json
@@ -19,6 +19,7 @@
             ]
         }
     },
+    "required": ["categories"],
     "definitions": {
         "ao-basis-dunning": {
             "properties": {
diff --git a/schema/methods_directory/physical/ao/other.json b/schema/methods_directory/physical/ao/other.json
index 9cdfc35c7..15d4cf4c2 100644
--- a/schema/methods_directory/physical/ao/other.json
+++ b/schema/methods_directory/physical/ao/other.json
@@ -19,6 +19,7 @@
             ]
         }
     },
+    "required": ["categories"],
     "definitions": {
         "ao-basis-other": {
             "properties": {
diff --git a/schema/methods_directory/physical/ao/pople.json b/schema/methods_directory/physical/ao/pople.json
index 43aa0419d..5a6bd7b58 100644
--- a/schema/methods_directory/physical/ao/pople.json
+++ b/schema/methods_directory/physical/ao/pople.json
@@ -19,6 +19,7 @@
             ]
         }
     },
+    "required": ["categories"],
     "definitions": {
         "ao-basis-pople": {
             "properties": {
diff --git a/schema/methods_directory/physical/psp.json b/schema/methods_directory/physical/psp.json
index 54d3e517d..7d1d0db38 100644
--- a/schema/methods_directory/physical/psp.json
+++ b/schema/methods_directory/physical/psp.json
@@ -24,5 +24,6 @@
                 }
             }
         }
-    }
+    },
+    "required": ["categories"]
 }
diff --git a/schema/methods_directory/physical/pw.json b/schema/methods_directory/physical/pw.json
index 99c33b9a1..e136cf6db 100644
--- a/schema/methods_directory/physical/pw.json
+++ b/schema/methods_directory/physical/pw.json
@@ -12,5 +12,6 @@
         "categories": {
             "$ref": "../../methods_category/physical/qm/wf/pw.json"
         }
-    }
+    },
+    "required": ["categories"]
 }
diff --git a/schema/methods_directory/physical/smearing.json b/schema/methods_directory/physical/smearing.json
index afdc6a5d7..099c2671a 100644
--- a/schema/methods_directory/physical/smearing.json
+++ b/schema/methods_directory/physical/smearing.json
@@ -12,5 +12,6 @@
         "categories": {
             "$ref": "../../methods_category/physical/qm/wf/smearing.json"
         }
-    }
+    },
+    "required": ["categories"]
 }
diff --git a/schema/methods_directory/physical/tetrahedron.json b/schema/methods_directory/physical/tetrahedron.json
index d116efb8f..0b9ee97d4 100644
--- a/schema/methods_directory/physical/tetrahedron.json
+++ b/schema/methods_directory/physical/tetrahedron.json
@@ -11,5 +11,6 @@
         "categories": {
             "$ref": "../../methods_category/physical/qm/wf/tetrahedron.json"
         }
-    }
+    },
+    "required": ["categories"]
 }