diff --git a/src/main/resources/application.conf b/src/main/resources/application.conf
index 28af2087a1..0a4abd3c50 100644
--- a/src/main/resources/application.conf
+++ b/src/main/resources/application.conf
@@ -87,7 +87,9 @@ cardano {
   wallet {
     host = "localhost"
     port = 8090
+    scheme = http
 
+    scheme = ${?NODE_CARDANO_WALLET_API_HTTP_SCHEME}
     host = ${?NODE_CARDANO_WALLET_API_HOST}
     port = ${?NODE_CARDANO_WALLET_API_PORT}
 
diff --git a/src/main/resources/db/migration/V1__create_tables.sql b/src/main/resources/db/migration/V1__create_tables.sql
index b302cb7450..b73819db65 100644
--- a/src/main/resources/db/migration/V1__create_tables.sql
+++ b/src/main/resources/db/migration/V1__create_tables.sql
@@ -143,8 +143,7 @@ CREATE TABLE public.public_keys
     ledger                    varchar(32)           NOT NULL,
     compressed                BYTEA                 NOT NULL,
     CONSTRAINT public_keys_pk PRIMARY KEY (did_suffix,
-                                           key_id),
-    CONSTRAINT x_compressed_length CHECK ((length(compressed) = 33))
+                                           key_id)
 );
 
 
diff --git a/src/main/scala/io/iohk/atala/prism/node/NodeConfig.scala b/src/main/scala/io/iohk/atala/prism/node/NodeConfig.scala
index 0c9dfab0c8..ee0d14988f 100644
--- a/src/main/scala/io/iohk/atala/prism/node/NodeConfig.scala
+++ b/src/main/scala/io/iohk/atala/prism/node/NodeConfig.scala
@@ -40,12 +40,13 @@ object NodeConfig {
   }
 
   def cardanoWalletConfig(config: Config): CardanoWalletApiClient.Config = {
+    val scheme = config.getString("scheme")
     val host = config.getString("host")
     val port = config.getInt("port")
     val routingHeaderName = Try("routingHeaderName").map(config.getString).toOption
     val routingHeaderValue = Try("routingHeaderValue").map(config.getString).toOption
     val routingHeader = Applicative[Option]
       .map2(routingHeaderName, routingHeaderValue)((headerName, headerValue) => Header(headerName, headerValue))
-    CardanoWalletApiClient.Config(host, port, routingHeader)
+    CardanoWalletApiClient.Config(scheme, host, port, routingHeader)
   }
 }
diff --git a/src/main/scala/io/iohk/atala/prism/node/cardano/wallet/api/ApiClient.scala b/src/main/scala/io/iohk/atala/prism/node/cardano/wallet/api/ApiClient.scala
index 2e46368917..361e09b69a 100644
--- a/src/main/scala/io/iohk/atala/prism/node/cardano/wallet/api/ApiClient.scala
+++ b/src/main/scala/io/iohk/atala/prism/node/cardano/wallet/api/ApiClient.scala
@@ -80,7 +80,7 @@ private[wallet] class ApiClient[F[_]: Functor](
       .headers(config.routingHeader.toList: _*)
       .method(
         method.httpMethod,
-        Uri.apply(config.host, config.port).withWholePath(method.path)
+        Uri.apply(config.scheme, config.host, config.port).withWholePath(method.path)
       )
       .body(method.requestBody.map(_.noSpaces).getOrElse(""))
       .send(backend)
@@ -97,7 +97,7 @@ private[wallet] class ApiClient[F[_]: Functor](
 
 private[wallet] object ApiClient {
 
-  case class Config(host: String, port: Int, routingHeader: Option[Header])
+  case class Config(scheme: String, host: String, port: Int, routingHeader: Option[Header])
 
   private[wallet] def defaultBackend[F[_]: Async]: Resource[F, SttpBackend[F, Any]] =
     AsyncHttpClientCatsBackend.resource[F]()
diff --git a/src/test/scala/io/iohk/atala/prism/node/cardano/wallet/testing/FakeCardanoWalletApiClient.scala b/src/test/scala/io/iohk/atala/prism/node/cardano/wallet/testing/FakeCardanoWalletApiClient.scala
index c191a1b538..50a4377b89 100644
--- a/src/test/scala/io/iohk/atala/prism/node/cardano/wallet/testing/FakeCardanoWalletApiClient.scala
+++ b/src/test/scala/io/iohk/atala/prism/node/cardano/wallet/testing/FakeCardanoWalletApiClient.scala
@@ -53,7 +53,7 @@ object FakeCardanoWalletApiClient {
     */
   object NotFound {
     def apply[F[_]: Async](): CardanoWalletApiClient[F] = {
-      val config = ApiClient.Config("localhost", 8090, Option.empty)
+      val config = ApiClient.Config("http", "localhost", 8090, Option.empty)
       val backend = AsyncHttpClientCatsBackend.stub
       new ApiClient(config, backend)
     }
@@ -66,7 +66,7 @@ object FakeCardanoWalletApiClient {
       responseBody: String,
       maybeRoutingHeader: Option[Header]
   ): CardanoWalletApiClient[F] = {
-    val config = ApiClient.Config("localhost", 8090, maybeRoutingHeader)
+    val config = ApiClient.Config("http", "localhost", 8090, maybeRoutingHeader)
     val backend = AsyncHttpClientCatsBackend.stub
       .whenRequestMatches(request =>
         request.uri.host.contains(config.host)