diff --git a/internal/assets/migrations/002_limits_increase.sql b/internal/assets/migrations/002_limits_increase.sql
new file mode 100644
index 0000000..aa77fd1
--- /dev/null
+++ b/internal/assets/migrations/002_limits_increase.sql
@@ -0,0 +1,21 @@
+-- +migrate Up
+
+alter table document_sod
+        alter column dg15 type varchar(32760),
+        alter column signed_attributes type varchar(65536),
+        alter column encapsulated_content type varchar(65536),
+        alter column signature type varchar(16384),
+        alter column aa_signature type varchar(16384),
+        alter column pem_file type varchar(65536),
+        alter column error type varchar(16384);
+
+-- +migrate Down
+
+alter table document_sod
+        alter column dg15 type varchar(512),
+        alter column signed_attributes type varchar(512),
+        alter column encapsulated_content type varchar(4096),
+        alter column signature type varchar(4096),
+        alter column aa_signature type varchar(4096),
+        alter column pem_file type varchar(4096),
+        alter column error type varchar(1024);
diff --git a/internal/service/api/requests/register.go b/internal/service/api/requests/register.go
index d4353b5..b15ac7d 100644
--- a/internal/service/api/requests/register.go
+++ b/internal/service/api/requests/register.go
@@ -45,31 +45,31 @@ func validateRegister(r resources.RegisterResponse) error {
 			})),
 		"/data/attributes/document_sod/dg15": validation.Validate(
 			r.Data.Attributes.DocumentSod.Dg15,
-			validation.Length(0, 512),
+			validation.Length(0, 32760),
 		),
 		"/data/attributes/document_sod/signed_attributes": validation.Validate(
 			r.Data.Attributes.DocumentSod.SignedAttributes,
 			validation.Required,
-			validation.Length(1, 512),
+			validation.Length(0, 65536),
 		),
 		"/data/attributes/document_sod/encapsulated_content": validation.Validate(
 			r.Data.Attributes.DocumentSod.EncapsulatedContent,
 			validation.Required,
-			validation.Length(1, 4096),
+			validation.Length(0, 65536),
 		),
 		"/data/attributes/document_sod/signature": validation.Validate(
 			r.Data.Attributes.DocumentSod.Signature,
 			validation.Required,
-			validation.Length(1, 4096),
+			validation.Length(0, 16384),
 		),
 		"/data/attributes/document_sod/aa_signature": validation.Validate(
 			r.Data.Attributes.DocumentSod.AaSignature,
-			validation.Length(0, 4096),
+			validation.Length(0, 16384),
 		),
 		"/data/attributes/document_sod/pem_file": validation.Validate(
 			r.Data.Attributes.DocumentSod.PemFile,
 			validation.Required,
-			validation.Length(1, 4096),
+			validation.Length(0, 65536),
 		),
 		"/data/attributes/zk_proof/proof": validation.Validate(
 			r.Data.Attributes.ZkProof.Proof,