diff --git a/migrations/V0002__actor_profile__add_extra_fields.sql b/migrations/V0002__actor_profile__add_extra_fields.sql
new file mode 100644
index 0000000..43458f4
--- /dev/null
+++ b/migrations/V0002__actor_profile__add_extra_fields.sql
@@ -0,0 +1 @@
+ALTER TABLE actor_profile ADD COLUMN extra_fields JSONB NOT NULL DEFAULT '[]';
diff --git a/migrations/schema.sql b/migrations/schema.sql
index 66ac352..1b00fe0 100644
--- a/migrations/schema.sql
+++ b/migrations/schema.sql
@@ -7,6 +7,7 @@ CREATE TABLE actor_profile (
     bio_source TEXT,
     avatar_file_name VARCHAR(100),
     banner_file_name VARCHAR(100),
+    extra_fields JSONB NOT NULL DEFAULT '[]',
     follower_count INTEGER NOT NULL CHECK (follower_count >= 0) DEFAULT 0,
     following_count INTEGER NOT NULL CHECK (following_count >= 0) DEFAULT 0,
     post_count INTEGER NOT NULL CHECK (post_count >= 0) DEFAULT 0,
diff --git a/src/activitypub/receiver.rs b/src/activitypub/receiver.rs
index 3809b98..7cc3492 100644
--- a/src/activitypub/receiver.rs
+++ b/src/activitypub/receiver.rs
@@ -152,6 +152,7 @@ pub async fn receive_activity(
                 bio_source: actor.summary,
                 avatar,
                 banner,
+                extra_fields: vec![],
             };
             profile_data.clean()?;
             update_profile(db_client, &profile.id, profile_data).await?;
diff --git a/src/mastodon_api/accounts/types.rs b/src/mastodon_api/accounts/types.rs
index f96ee36..0b139d5 100644
--- a/src/mastodon_api/accounts/types.rs
+++ b/src/mastodon_api/accounts/types.rs
@@ -4,13 +4,18 @@ use chrono::{DateTime, Utc};
 use serde::{Deserialize, Serialize};
 use uuid::Uuid;
 
-use crate::models::profiles::types::{DbActorProfile, ProfileUpdateData};
+use crate::models::profiles::types::{
+    DbActorProfile,
+    ExtraField,
+    ProfileUpdateData,
+};
 use crate::utils::files::{FileError, save_validated_b64_file, get_file_url};
 
 /// https://docs.joinmastodon.org/entities/source/
 #[derive(Serialize)]
 pub struct Source {
     pub note: Option<String>,
+    pub fields: Vec<ExtraField>,
 }
 
 /// https://docs.joinmastodon.org/entities/account/
@@ -24,6 +29,7 @@ pub struct Account {
     pub note: Option<String>,
     pub avatar: Option<String>,
     pub header: Option<String>,
+    pub fields: Vec<ExtraField>,
     pub followers_count: i32,
     pub following_count: i32,
     pub statuses_count: i32,
@@ -39,7 +45,10 @@ impl Account {
             // Remote actor
             None
         } else {
-            let source = Source { note: profile.bio_source };
+            let source = Source {
+                note: profile.bio_source,
+                fields: profile.extra_fields.clone().unpack(),
+            };
             Some(source)
         };
         Self {
@@ -51,6 +60,7 @@ impl Account {
             note: profile.bio,
             avatar: avatar_url,
             header: header_url,
+            fields: profile.extra_fields.unpack(),
             followers_count: profile.follower_count,
             following_count: profile.following_count,
             statuses_count: profile.post_count,
@@ -67,6 +77,7 @@ pub struct AccountUpdateData {
     pub note_source: Option<String>,
     pub avatar: Option<String>,
     pub header: Option<String>,
+    pub fields_attributes: Option<Vec<ExtraField>>,
 }
 
 fn process_b64_image_field_value(
@@ -106,12 +117,14 @@ impl AccountUpdateData {
         let banner = process_b64_image_field_value(
             self.header, current_banner.clone(), media_dir,
         )?;
+        let extra_fields = self.fields_attributes.unwrap_or(vec![]);
         let profile_data = ProfileUpdateData {
             display_name: self.display_name,
             bio: self.note,
             bio_source: self.note_source,
             avatar,
             banner,
+            extra_fields,
         };
         Ok(profile_data)
     }
diff --git a/src/models/profiles/queries.rs b/src/models/profiles/queries.rs
index 459e9ff..a6fdbc7 100644
--- a/src/models/profiles/queries.rs
+++ b/src/models/profiles/queries.rs
@@ -2,7 +2,12 @@ use tokio_postgres::GenericClient;
 use uuid::Uuid;
 
 use crate::errors::DatabaseError;
-use super::types::{DbActorProfile, ProfileCreateData, ProfileUpdateData};
+use super::types::{
+    ExtraFields,
+    DbActorProfile,
+    ProfileCreateData,
+    ProfileUpdateData,
+};
 
 /// Create new profile using given Client or Transaction.
 pub async fn create_profile(
@@ -56,8 +61,9 @@ pub async fn update_profile(
             bio = $2,
             bio_source = $3,
             avatar_file_name = $4,
-            banner_file_name = $5
-        WHERE id = $6
+            banner_file_name = $5,
+            extra_fields = $6
+        WHERE id = $7
         RETURNING actor_profile
         ",
         &[
@@ -66,6 +72,7 @@ pub async fn update_profile(
             &data.bio_source,
             &data.avatar,
             &data.banner,
+            &ExtraFields(data.extra_fields),
             &profile_id,
         ],
     ).await?;
diff --git a/src/models/profiles/types.rs b/src/models/profiles/types.rs
index c6565f7..6b37006 100644
--- a/src/models/profiles/types.rs
+++ b/src/models/profiles/types.rs
@@ -1,11 +1,53 @@
 use chrono::{DateTime, Utc};
-use postgres_types::FromSql;
+use postgres_types::{
+    FromSql, ToSql, IsNull, Type, Json,
+    accepts, to_sql_checked,
+    private::BytesMut,
+};
+use serde::{Deserialize, Serialize};
 use serde_json::Value;
 use uuid::Uuid;
 
 use crate::errors::ValidationError;
 use crate::utils::html::clean_html;
 
+#[derive(Clone, Debug, Deserialize, Serialize)]
+pub struct ExtraField {
+    pub name: String,
+    pub value: String,
+}
+
+#[derive(Clone, Debug, Deserialize, Serialize)]
+pub struct ExtraFields(pub Vec<ExtraField>);
+
+impl ExtraFields {
+    pub fn unpack(self) -> Vec<ExtraField> {
+        let Self(extra_fields) = self;
+        extra_fields
+    }
+}
+
+type SqlError = Box<dyn std::error::Error + Sync + Send>;
+
+impl<'a> FromSql<'a> for ExtraFields {
+    fn from_sql(ty: &Type, raw: &'a [u8]) -> Result<Self, SqlError> {
+        let Json(json_value) = Json::<Value>::from_sql(ty, raw)?;
+        let fields: Self = serde_json::from_value(json_value)?;
+        Ok(fields)
+    }
+    accepts!(JSON,JSONB);
+}
+
+impl ToSql for ExtraFields {
+    fn to_sql(&self, ty: &Type, out: &mut BytesMut) -> Result<IsNull, SqlError> {
+        let value = serde_json::to_value(self)?;
+        Json(value).to_sql(ty, out)
+    }
+
+    accepts!(JSON, JSONB);
+    to_sql_checked!();
+}
+
 #[derive(Clone, FromSql)]
 #[postgres(name = "actor_profile")]
 pub struct DbActorProfile {
@@ -17,6 +59,7 @@ pub struct DbActorProfile {
     pub bio_source: Option<String>, // plaintext or markdown
     pub avatar_file_name: Option<String>,
     pub banner_file_name: Option<String>,
+    pub extra_fields: ExtraFields,
     pub follower_count: i32,
     pub following_count: i32,
     pub post_count: i32,
@@ -40,12 +83,28 @@ pub struct ProfileUpdateData {
     pub bio_source: Option<String>,
     pub avatar: Option<String>,
     pub banner: Option<String>,
+    pub extra_fields: Vec<ExtraField>,
 }
 
 impl ProfileUpdateData {
-    /// Validate and clean bio.
     pub fn clean(&mut self) -> Result<(), ValidationError> {
+        // Validate and clean bio
         self.bio = self.bio.as_ref().map(|val| clean_html(val));
+        // Remove fields with empty labels
+        self.extra_fields = self.extra_fields.iter().cloned()
+            .filter(|field| field.name.trim().len() > 0)
+            .collect();
+        // Validate extra fields
+        if self.extra_fields.len() >= 10 {
+            return Err(ValidationError("at most 10 fields are allowed"));
+        }
+        let mut unique_labels: Vec<String> = self.extra_fields.iter()
+            .map(|field| field.name.clone()).collect();
+        unique_labels.sort();
+        unique_labels.dedup();
+        if unique_labels.len() < self.extra_fields.len() {
+            return Err(ValidationError("duplicate labels"));
+        }
         Ok(())
     }
 }