diff --git a/backend/lib/validator/api.js b/backend/lib/validator/api.js
index 6c738d5097..9dfa0e62d6 100644
--- a/backend/lib/validator/api.js
+++ b/backend/lib/validator/api.js
@@ -9,6 +9,8 @@ const ajv = new Ajv({
 	coerceTypes: true,
 });
 
+const compiledSchemas = new WeakMap();
+
 /**
  * @param {Object} schema
  * @param {Object} payload
@@ -25,7 +27,11 @@ const apiValidator = async (schema, payload /*, description*/) => {
 	}
 
 
-	const validate = ajv.compile(schema);
+	let validate = compiledSchemas.get(schema);
+	if (!validate) {
+		validate = ajv.compile(schema);
+		compiledSchemas.set(schema, validate);
+	}
 
 	const valid = validate(payload);
 
diff --git a/backend/lib/validator/index.js b/backend/lib/validator/index.js
index 5f2586fd67..19eb9a3c80 100644
--- a/backend/lib/validator/index.js
+++ b/backend/lib/validator/index.js
@@ -14,6 +14,8 @@ const ajv = new Ajv({
 	schemas: [commonDefinitions],
 });
 
+const compiledSchemas = new WeakMap();
+
 /**
  *
  * @param   {Object} schema
@@ -26,7 +28,11 @@ const validator = (schema, payload) => {
 			reject(new errs.InternalValidationError("Payload is falsy"));
 		} else {
 			try {
-				const validate = ajv.compile(schema);
+				let validate = compiledSchemas.get(schema);
+				if (!validate) {
+					validate = ajv.compile(schema);
+					compiledSchemas.set(schema, validate);
+				}
 				const valid = validate(payload);
 
 				if (valid && !validate.errors) {