diff --git a/modules/loader/src/main/resources/iglu-client-embedded/com.snowplowanalytics.iglu/resolver-config/jsonschema/1-0-0 b/modules/loader/src/main/resources/iglu-client-embedded/com.snowplowanalytics.iglu/resolver-config/jsonschema/1-0-0
new file mode 100644
index 0000000..1a43dee
--- /dev/null
+++ b/modules/loader/src/main/resources/iglu-client-embedded/com.snowplowanalytics.iglu/resolver-config/jsonschema/1-0-0
@@ -0,0 +1,91 @@
+{
+	"$schema": "http://iglucentral.com/schemas/com.snowplowanalytics.self-desc/schema/jsonschema/1-0-0#",
+	"description": "Schema for an Iglu resolver's configuration",
+	"self": {
+		"vendor": "com.snowplowanalytics.iglu",
+		"name": "resolver-config",
+		"format": "jsonschema",
+		"version": "1-0-0"
+	},
+
+	"type": "object",
+
+	"properties": {
+
+		"cacheSize": {
+			"type": "integer",
+ 			"minimum": 0
+		},
+
+		"repositories": {
+			"type": "array",
+			"items": {
+				"type": "object",
+
+				"properties": {
+
+					"name": {
+						"type": "string"
+					},
+
+					"priority": {
+						"type": "integer"
+					},
+
+					"vendorPrefixes": {
+						"type": "array",
+						"items": {
+							"type": "string"
+						}
+					},
+
+					"connection": {
+						"type": "object",
+						"oneOf": [
+							{
+								"properties": {
+									"embedded": {
+										"type": "object",
+										"properties": {
+											"path": {
+												"type": "string"
+											}
+										},
+										"required": ["path"],
+										"additionalProperties": false
+									}
+								},
+								"required": ["embedded"],
+								"additionalProperties": false
+							},
+							{
+								"properties": {
+									"http": {
+										"type": "object",
+										"properties": {
+											"uri": {
+												"type": "string",
+												"format": "uri"
+											}
+										},
+										"required": ["uri"],
+										"additionalProperties": false
+									}
+								},
+								"required": ["http"],
+								"additionalProperties": false
+							}
+						]
+					}
+				},
+				"required": ["name", "priority", "vendorPrefixes", "connection"],
+				"additionalProperties": false
+			}
+		}
+
+	},
+
+	"required": ["cacheSize", "repositories"],
+	"additionalProperties": false
+}
+
diff --git a/modules/loader/src/main/resources/iglu-client-embedded/com.snowplowanalytics.iglu/resolver-config/jsonschema/1-0-1 b/modules/loader/src/main/resources/iglu-client-embedded/com.snowplowanalytics.iglu/resolver-config/jsonschema/1-0-1
new file mode 100644
index 0000000..c1c7882
--- /dev/null
+++ b/modules/loader/src/main/resources/iglu-client-embedded/com.snowplowanalytics.iglu/resolver-config/jsonschema/1-0-1
@@ -0,0 +1,93 @@
+{
+	"$schema": "http://iglucentral.com/schemas/com.snowplowanalytics.self-desc/schema/jsonschema/1-0-0#",
+	"description": "Schema for an Iglu resolver's configuration",
+	"self": {
+		"vendor": "com.snowplowanalytics.iglu",
+		"name": "resolver-config",
+		"format": "jsonschema",
+		"version": "1-0-1"
+	},
+
+	"type": "object",
+
+	"properties": {
+
+		"cacheSize": {
+			"type": "integer",
+ 			"minimum": 0
+		},
+
+		"repositories": {
+			"type": "array",
+			"items": {
+				"type": "object",
+
+				"properties": {
+
+					"name": {
+						"type": "string"
+					},
+
+					"priority": {
+						"type": "integer"
+					},
+
+					"vendorPrefixes": {
+						"type": "array",
+						"items": {
+							"type": "string"
+						}
+					},
+
+					"connection": {
+						"type": "object",
+						"oneOf": [
+							{
+								"properties": {
+									"embedded": {
+										"type": "object",
+										"properties": {
+											"path": {
+												"type": "string"
+											}
+										},
+										"required": ["path"],
+										"additionalProperties": false
+									}
+								},
+								"required": ["embedded"],
+								"additionalProperties": false
+							},
+							{
+								"properties": {
+									"http": {
+										"type": "object",
+										"properties": {
+											"uri": {
+												"type": "string",
+												"format": "uri"
+											},
+											"apikey": {
+												"type": ["string", "null"]
+											}
+										},
+										"required": ["uri"],
+										"additionalProperties": false
+									}
+								},
+								"required": ["http"],
+								"additionalProperties": false
+							}
+						]
+					}
+				},
+				"required": ["name", "priority", "vendorPrefixes", "connection"],
+				"additionalProperties": false
+			}
+		}
+
+	},
+
+	"required": ["cacheSize", "repositories"],
+	"additionalProperties": false
+}
diff --git a/modules/loader/src/main/resources/iglu-client-embedded/com.snowplowanalytics.iglu/resolver-config/jsonschema/1-0-2 b/modules/loader/src/main/resources/iglu-client-embedded/com.snowplowanalytics.iglu/resolver-config/jsonschema/1-0-2
new file mode 100644
index 0000000..0b9129a
--- /dev/null
+++ b/modules/loader/src/main/resources/iglu-client-embedded/com.snowplowanalytics.iglu/resolver-config/jsonschema/1-0-2
@@ -0,0 +1,97 @@
+{
+	"$schema": "http://iglucentral.com/schemas/com.snowplowanalytics.self-desc/schema/jsonschema/1-0-0#",
+	"description": "Schema for an Iglu resolver's configuration",
+	"self": {
+		"vendor": "com.snowplowanalytics.iglu",
+		"name": "resolver-config",
+		"format": "jsonschema",
+		"version": "1-0-2"
+	},
+	
+	"type": "object",
+
+	"properties": {
+
+		"cacheSize": {
+			"type": "number"
+		},
+
+		"cacheTtl": {
+			"type": ["integer", "null"],
+			"minimum": 1
+		},
+
+		"repositories": {
+			"type": "array",
+			"items": {
+				"type": "object",
+
+				"properties": {
+
+					"name": {
+						"type": "string"
+					},
+
+					"priority": {
+						"type": "number"
+					},
+
+					"vendorPrefixes": {
+						"type": "array",
+						"items": {
+							"type": "string"
+						}
+					},
+
+					"connection": {
+						"type": "object",
+						"oneOf": [
+							{
+								"properties": {
+									"embedded": {
+										"type": "object",
+										"properties": {
+											"path": {
+												"type": "string"
+											}
+										},
+										"required": ["path"],
+										"additionalProperties": false
+									}
+								},
+								"required": ["embedded"],
+								"additionalProperties": false
+							},
+							{
+								"properties": {
+									"http": {
+										"type": "object",
+										"properties": {
+											"uri": {
+												"type": "string",
+												"format": "uri"
+											},
+											"apikey": {
+												"type": ["string", "null"]
+											}
+										},
+										"required": ["uri"],
+										"additionalProperties": false
+									}
+								},
+								"required": ["http"],
+								"additionalProperties": false
+							}
+						]
+					}
+				},
+				"required": ["name", "priority", "vendorPrefixes", "connection"],
+				"additionalProperties": false
+			}
+		}
+
+	},
+
+	"required": ["cacheSize", "repositories"],
+	"additionalProperties": false
+}
diff --git a/modules/loader/src/main/resources/iglu-client-embedded/com.snowplowanalytics.iglu/resolver-config/jsonschema/1-0-3 b/modules/loader/src/main/resources/iglu-client-embedded/com.snowplowanalytics.iglu/resolver-config/jsonschema/1-0-3
new file mode 100644
index 0000000..199fa7a
--- /dev/null
+++ b/modules/loader/src/main/resources/iglu-client-embedded/com.snowplowanalytics.iglu/resolver-config/jsonschema/1-0-3
@@ -0,0 +1,97 @@
+{
+	"$schema": "http://iglucentral.com/schemas/com.snowplowanalytics.self-desc/schema/jsonschema/1-0-0#",
+	"description": "Schema for an Iglu resolver's configuration",
+	"self": {
+		"vendor": "com.snowplowanalytics.iglu",
+		"name": "resolver-config",
+		"format": "jsonschema",
+		"version": "1-0-3"
+	},
+
+	"type": "object",
+
+	"properties": {
+
+		"cacheSize": {
+			"type": "number"
+		},
+
+		"cacheTtl": {
+			"type": ["integer", "null"],
+			"minimum": 0
+		},
+
+		"repositories": {
+			"type": "array",
+			"items": {
+				"type": "object",
+
+				"properties": {
+
+					"name": {
+						"type": "string"
+					},
+
+					"priority": {
+						"type": "number"
+					},
+
+					"vendorPrefixes": {
+						"type": "array",
+						"items": {
+							"type": "string"
+						}
+					},
+
+					"connection": {
+						"type": "object",
+						"oneOf": [
+							{
+								"properties": {
+									"embedded": {
+										"type": "object",
+										"properties": {
+											"path": {
+												"type": "string"
+											}
+										},
+										"required": ["path"],
+										"additionalProperties": false
+									}
+								},
+								"required": ["embedded"],
+								"additionalProperties": false
+							},
+							{
+								"properties": {
+									"http": {
+										"type": "object",
+										"properties": {
+											"uri": {
+												"type": "string",
+												"format": "uri"
+											},
+											"apikey": {
+												"type": ["string", "null"]
+											}
+										},
+										"required": ["uri"],
+										"additionalProperties": false
+									}
+								},
+								"required": ["http"],
+								"additionalProperties": false
+							}
+						]
+					}
+				},
+				"required": ["name", "priority", "vendorPrefixes", "connection"],
+				"additionalProperties": false
+			}
+		}
+
+	},
+
+	"required": ["cacheSize", "repositories"],
+	"additionalProperties": false
+}
diff --git a/modules/loader/src/main/scala/com/snowplowanalytics/snowplow/postgres/config/Cli.scala b/modules/loader/src/main/scala/com/snowplowanalytics/snowplow/postgres/config/Cli.scala
index d06a52c..ace488c 100644
--- a/modules/loader/src/main/scala/com/snowplowanalytics/snowplow/postgres/config/Cli.scala
+++ b/modules/loader/src/main/scala/com/snowplowanalytics/snowplow/postgres/config/Cli.scala
@@ -31,7 +31,11 @@ import io.circe.config.parser.{decode => hoconDecode}
 
 import scala.io.Source
 
-import com.snowplowanalytics.iglu.client.Client
+import com.snowplowanalytics.iglu.client.{CirceValidator, Client}
+import com.snowplowanalytics.iglu.client.resolver.Resolver
+import com.snowplowanalytics.iglu.client.resolver.registries.Registry
+import com.snowplowanalytics.iglu.core.SelfDescribingData
+import com.snowplowanalytics.iglu.core.circe.CirceIgluCodecs._
 
 import com.snowplowanalytics.snowplow.badrows.Processor
 
@@ -79,6 +83,8 @@ object Cli {
   private def fromRawConfig[F[_]: Async: Clock](rawConfig: RawConfig): EitherT[F, String, Cli[F]] =
     for {
       resolverJson <- loadJson(rawConfig.resolver).toEitherT[F]
+      resolverSdj <- EitherT.fromEither[F](resolverJson.as[SelfDescribingData[Json]]).leftMap(_.show)
+      _ <- Client[F, Json](Resolver(List(Registry.EmbeddedRegistry), None), CirceValidator).check(resolverSdj).leftMap(_.show)
       igluClient <- Client.parseDefault[F](resolverJson).leftMap(_.show)
       configHocon <- loadHocon(rawConfig.config).toEitherT[F]
       appConfig <- hoconDecode[LoaderConfig](configHocon).leftMap(e => s"Could not parse config: ${e.show}").toEitherT[F]