diff --git a/src/pretix/static/schema/pdf-layout.schema.json b/src/pretix/static/schema/pdf-layout.schema.json
index 4079a3d1e4..833865f45d 100644
--- a/src/pretix/static/schema/pdf-layout.schema.json
+++ b/src/pretix/static/schema/pdf-layout.schema.json
@@ -31,7 +31,7 @@
               },
               {
                 "type": "string",
-                "pattern": "^[0-9]+(\\.[0-9]+)?$"
+                "pattern": "^-?[0-9]+(\\.[0-9]+)?$"
               }
             ]
           },
@@ -43,7 +43,7 @@
               },
               {
                 "type": "string",
-                "pattern": "^[0-9]+(\\.[0-9]+)?$"
+                "pattern": "^-?[0-9]+(\\.[0-9]+)?$"
               }
             ]
           },
@@ -73,7 +73,7 @@
               },
               {
                 "type": "string",
-                "pattern": "^[0-9]+(\\.[0-9]+)?$"
+                "pattern": "^-?[0-9]+(\\.[0-9]+)?$"
               }
             ]
           },
@@ -110,7 +110,7 @@
               },
               {
                 "type": "string",
-                "pattern": "^[0-9]+(\\.[0-9]+)?$"
+                "pattern": "^-?[0-9]+(\\.[0-9]+)?$"
               }
             ]
           },
@@ -122,7 +122,7 @@
               },
               {
                 "type": "string",
-                "pattern": "^[0-9]+(\\.[0-9]+)?$"
+                "pattern": "^-?[0-9]+(\\.[0-9]+)?$"
               }
             ]
           },
@@ -138,7 +138,7 @@
               },
               {
                 "type": "string",
-                "pattern": "^[0-9]+(\\.[0-9]+)?$"
+                "pattern": "^-?[0-9]+(\\.[0-9]+)?$"
               }
             ]
           },
@@ -150,7 +150,7 @@
               },
               {
                 "type": "string",
-                "pattern": "^[0-9]+(\\.[0-9]+)?$"
+                "pattern": "^-?[0-9]+(\\.[0-9]+)?$"
               }
             ]
           }
@@ -188,7 +188,7 @@
               },
               {
                 "type": "string",
-                "pattern": "^[0-9]+(\\.[0-9]+)?$"
+                "pattern": "^-?[0-9]+(\\.[0-9]+)?$"
               }
             ]
           },
@@ -200,7 +200,7 @@
               },
               {
                 "type": "string",
-                "pattern": "^[0-9]+(\\.[0-9]+)?$"
+                "pattern": "^-?[0-9]+(\\.[0-9]+)?$"
               }
             ]
           },
@@ -212,7 +212,7 @@
               },
               {
                 "type": "string",
-                "pattern": "^[0-9]+(\\.[0-9]+)?$"
+                "pattern": "^-?[0-9]+(\\.[0-9]+)?$"
               }
             ]
           },
@@ -247,7 +247,7 @@
               },
               {
                 "type": "string",
-                "pattern": "^[0-9]+(\\.[0-9]+)?$"
+                "pattern": "^-?[0-9]+(\\.[0-9]+)?$"
               }
             ]
           },
@@ -259,7 +259,7 @@
               },
               {
                 "type": "string",
-                "pattern": "^[0-9]+(\\.[0-9]+)?$"
+                "pattern": "^-?[0-9]+(\\.[0-9]+)?$"
               }
             ]
           },
@@ -307,7 +307,7 @@
               },
               {
                 "type": "string",
-                "pattern": "^[0-9]+(\\.[0-9]+)?$"
+                "pattern": "^-?[0-9]+(\\.[0-9]+)?$"
               }
             ]
           }
@@ -339,7 +339,7 @@
               },
               {
                 "type": "string",
-                "pattern": "^[0-9]+(\\.[0-9]+)?$"
+                "pattern": "^-?[0-9]+(\\.[0-9]+)?$"
               }
             ]
           },
@@ -351,7 +351,7 @@
               },
               {
                 "type": "string",
-                "pattern": "^[0-9]+(\\.[0-9]+)?$"
+                "pattern": "^-?[0-9]+(\\.[0-9]+)?$"
               }
             ]
           },
@@ -371,7 +371,7 @@
               },
               {
                 "type": "string",
-                "pattern": "^[0-9]+(\\.[0-9]+)?$"
+                "pattern": "^-?[0-9]+(\\.[0-9]+)?$"
               }
             ]
           }