diff --git a/src/routes/project_creation.rs b/src/routes/project_creation.rs
index d91a17fb4..eb7459577 100644
--- a/src/routes/project_creation.rs
+++ b/src/routes/project_creation.rs
@@ -130,7 +130,7 @@ fn default_project_type() -> String {
 
 #[derive(Serialize, Deserialize, Validate, Clone)]
 struct ProjectCreateData {
-    #[validate(length(min = 3, max = 256))]
+    #[validate(length(min = 3, max = 64))]
     #[serde(alias = "mod_name")]
     /// The title or name of the project.
     pub title: String,
@@ -145,7 +145,7 @@ struct ProjectCreateData {
     #[serde(alias = "mod_slug")]
     /// The slug of a project, used for vanity URLs
     pub slug: String,
-    #[validate(length(min = 3, max = 2048))]
+    #[validate(length(min = 3, max = 255))]
     #[serde(alias = "mod_description")]
     /// A short description of the project.
     pub description: String,
diff --git a/src/routes/projects.rs b/src/routes/projects.rs
index 196959a9e..d8c123d55 100644
--- a/src/routes/projects.rs
+++ b/src/routes/projects.rs
@@ -251,9 +251,9 @@ pub async fn dependency_list(
 /// A project returned from the API
 #[derive(Serialize, Deserialize, Validate)]
 pub struct EditProject {
-    #[validate(length(min = 3, max = 256))]
+    #[validate(length(min = 3, max = 64))]
     pub title: Option<String>,
-    #[validate(length(min = 3, max = 2048))]
+    #[validate(length(min = 3, max = 256))]
     pub description: Option<String>,
     #[validate(length(max = 65536))]
     pub body: Option<String>,
diff --git a/src/routes/users.rs b/src/routes/users.rs
index 1bd4ed6d5..43c4e33a9 100644
--- a/src/routes/users.rs
+++ b/src/routes/users.rs
@@ -130,21 +130,21 @@ lazy_static! {
 
 #[derive(Serialize, Deserialize, Validate)]
 pub struct EditUser {
-    #[validate(length(min = 1, max = 255), regex = "RE_URL_SAFE")]
+    #[validate(length(min = 1, max = 39), regex = "RE_URL_SAFE")]
     pub username: Option<String>,
     #[serde(
         default,
         skip_serializing_if = "Option::is_none",
         with = "::serde_with::rust::double_option"
     )]
-    #[validate(length(min = 1, max = 255), regex = "RE_URL_SAFE")]
+    #[validate(length(min = 1, max = 64), regex = "RE_URL_SAFE")]
     pub name: Option<Option<String>>,
     #[serde(
         default,
         skip_serializing_if = "Option::is_none",
         with = "::serde_with::rust::double_option"
     )]
-    #[validate(email)]
+    #[validate(email, length(max = 2048))]
     pub email: Option<Option<String>>,
     #[serde(
         default,
diff --git a/src/routes/version_creation.rs b/src/routes/version_creation.rs
index d25ada6f9..dd15dfb5f 100644
--- a/src/routes/version_creation.rs
+++ b/src/routes/version_creation.rs
@@ -32,11 +32,11 @@ pub struct InitialVersionData {
     #[validate(length(min = 1, max = 256))]
     pub file_parts: Vec<String>,
     #[validate(
-        length(min = 1, max = 64),
+        length(min = 1, max = 32),
         regex = "crate::util::validate::RE_URL_SAFE"
     )]
     pub version_number: String,
-    #[validate(length(min = 1, max = 256))]
+    #[validate(length(min = 1, max = 64))]
     #[serde(alias = "name")]
     pub version_title: String,
     #[validate(length(max = 65536))]
diff --git a/src/routes/versions.rs b/src/routes/versions.rs
index 62fa5df2e..585bbebe3 100644
--- a/src/routes/versions.rs
+++ b/src/routes/versions.rs
@@ -167,10 +167,10 @@ pub async fn version_get(
 
 #[derive(Serialize, Deserialize, Validate)]
 pub struct EditVersion {
-    #[validate(length(min = 1, max = 256))]
+    #[validate(length(min = 1, max = 64))]
     pub name: Option<String>,
     #[validate(
-        length(min = 1, max = 64),
+        length(min = 1, max = 32),
         regex = "crate::util::validate::RE_URL_SAFE"
     )]
     pub version_number: Option<String>,