diff --git a/dub.sdl b/dub.sdl
index 54c8a889..cee517c6 100644
--- a/dub.sdl
+++ b/dub.sdl
@@ -6,7 +6,7 @@ authors "Sönke Ludwig" "Martin Nowak" "Anton Fediushin aka ohdatboi" \
 	"see GitHub for more"
 license "BSL-1.0"
 
-dependency "vibe-d" version="~>0.9.5"
+dependency "vibe-d" version="~>0.9.7-alpha.3"
 dependency "dub" version="~>1.33.0"
 dependency "userman" version="~>0.4.0"
 dependency "uritemplate" version="~>1.0.0"
diff --git a/dub.selections.json b/dub.selections.json
index 3cead27f..b90bde8b 100644
--- a/dub.selections.json
+++ b/dub.selections.json
@@ -19,6 +19,6 @@
 		"uritemplate": "1.0.0",
 		"userman": "0.4.2",
 		"vibe-core": "2.2.0",
-		"vibe-d": "0.9.6"
+		"vibe-d": "0.9.7-alpha.3"
 	}
 }
diff --git a/source/dubregistry/cache.d b/source/dubregistry/cache.d
index f4ae46d0..fe419f87 100644
--- a/source/dubregistry/cache.d
+++ b/source/dubregistry/cache.d
@@ -37,12 +37,12 @@ class URLCache {
 		import dubregistry.mongodb : databaseName, getMongoClient;
 		m_db = getMongoClient();
 		m_entries = m_db.getDatabase(databaseName)["urlcache.entries"];
-		m_entries.ensureIndex([tuple("url", 1)]);
+		m_entries.createIndex(IndexModel().add("url", 1));
 	}
 
 	void clearEntry(URL url)
 	{
-		m_entries.remove(["url": url.toString()]);
+		m_entries.deleteOne(["url": url.toString()]);
 	}
 
 	void get(URL url, scope void delegate(scope InputStream str) @safe callback,
@@ -94,7 +94,7 @@ class URLCache {
 			if (!be.isNull()) {
 				// invalidate out of date cache entries
 				if (be["_id"].get!BsonObjectID.timeStamp < now - m_maxCacheTime)
-					m_entries.remove(["_id": be["_id"]]);
+					m_entries.deleteOne(["_id": be["_id"]]);
 
 				deserializeBson(entry, be);
 				if (mode == CacheMatchMode.always) {
@@ -129,6 +129,8 @@ class URLCache {
 							result_headers[header] = v;
 					}
 
+					UpdateOptions upsert;
+					upsert.upsert = true;
 					switch (res.statusCode) {
 						default:
 							throw new Exception("Unexpected reply for '"~url.toString().black~"': "~httpStatusText(res.statusCode));
@@ -153,7 +155,7 @@ class URLCache {
 
 							entry.redirectURL = url.toString();
 							entry.headers = result_headers;
-							m_entries.update(["_id": entry._id], entry, UpdateFlags.Upsert);
+							m_entries.replaceOne(["_id": entry._id], entry, upsert);
 							break;
 						case HTTPStatus.ok:
 							auto pet = "ETag" in res.headers;
@@ -165,7 +167,7 @@ class URLCache {
 								if (pet) entry.etag = *pet;
 								entry.data = BsonBinData(BsonBinData.Type.Generic, cast(immutable)rawdata);
 								entry.headers = result_headers;
-								m_entries.update(["_id": entry._id], entry, UpdateFlags.Upsert);
+								m_entries.replaceOne(["_id": entry._id], entry, upsert);
 								result = createMemoryStream(rawdata, false);
 								break;
 							}
diff --git a/source/dubregistry/dbcontroller.d b/source/dubregistry/dbcontroller.d
index 13e443f9..5341f766 100644
--- a/source/dubregistry/dbcontroller.d
+++ b/source/dubregistry/dbcontroller.d
@@ -39,9 +39,13 @@ class DbController {
 		//
 
 		// create indices
-		m_packages.ensureIndex([tuple("name", 1)], IndexFlags.Unique);
-		m_packages.ensureIndex([tuple("stats.score", 1)]);
-		m_downloads.ensureIndex([tuple("package", 1), tuple("version", 1)]);
+		IndexOptions opt;
+		opt.unique = true;
+		m_packages.createIndexes([
+			IndexModel().add("name", 1).withOptions(opt),
+			IndexModel().add("stats.score", 1)
+		]);
+		m_downloads.createIndex(IndexModel().add("package", 1).add("version", 1));
 
 		// add current text index
 		immutable keyWeights = [
@@ -63,8 +67,8 @@ class DbController {
 		auto cmd = Bson.emptyObject;
 		cmd["createIndexes"] = Bson("packages");
 		cmd["indexes"] = [Bson(fts)];
-		auto res = db.runCommand(cmd);
-		enforce(res["ok"].opt!double == 1.0, "Failed to create search index.\n"~res.toString);
+		// Create search index
+		db.runCommandChecked(cmd);
 	}
 
 	void addPackage(ref DbPackage pack)
@@ -72,13 +76,15 @@ class DbController {
 		enforce(m_packages.findOne(["name": pack.name], ["_id": true]).isNull(), "A package with the same name is already registered.");
 		if (pack._id == BsonObjectID.init)
 			pack._id = BsonObjectID.generate();
-		m_packages.insert(pack);
+		m_packages.insertOne(pack);
 	}
 
 	void addOrSetPackage(ref DbPackage pack)
 	{
 		enforce(pack._id != BsonObjectID.init, "Cannot update a packag with no ID.");
-		m_packages.update(["_id": pack._id], pack, UpdateFlags.upsert);
+		UpdateOptions opts;
+		opts.upsert = true;
+		m_packages.replaceOne(["_id": pack._id], pack, opts);
 	}
 
 	DbPackage getPackage(string packname)
@@ -137,22 +143,22 @@ class DbController {
 
 	void removePackage(string packname, BsonObjectID user)
 	{
-		m_packages.remove(["name": Bson(packname), "owner": Bson(user)]);
+		m_packages.deleteOne(["name": Bson(packname), "owner": Bson(user)]);
 	}
 
 	void setPackageErrors(string packname, string[] error...)
 	{
-		m_packages.update(["name": packname], ["$set": ["errors": error]]);
+		m_packages.updateOne(["name": packname], ["$set": ["errors": error]]);
 	}
 
 	void setPackageCategories(string packname, string[] categories...)
 	{
-		m_packages.update(["name": packname], ["$set": ["categories": categories]]);
+		m_packages.updateOne(["name": packname], ["$set": ["categories": categories]]);
 	}
 
 	void setPackageRepository(string packname, DbRepository repo)
 	{
-		m_packages.update(["name": packname], ["$set": ["repository": repo]]);
+		m_packages.updateOne(["name": packname], ["$set": ["repository": repo]]);
 	}
 
 	void setPackageLogo(string packname, bdata_t png)
@@ -161,7 +167,7 @@ class DbController {
 
 		if (png.length) {
 			auto id = BsonObjectID.generate();
-			m_files.insert([
+			m_files.insertOne([
 				"_id": Bson(id),
 				"data": Bson(BsonBinData(BsonBinData.Type.generic, png))
 			]);
@@ -174,15 +180,15 @@ class DbController {
 		// remove existing logo file
 		auto l = m_packages.findOne(["name": packname], ["logo": 1]);
 		if (!l.isNull && !l.tryIndex("logo").isNull)
-			m_files.remove(["_id": l["logo"]]);
+			m_files.deleteOne(["_id": l["logo"]]);
 
 		// set the new logo
-		m_packages.update(["name": packname], update);
+		m_packages.updateOne(["name": packname], update);
 	}
 
 	void setDocumentationURL(string packname, string documentationURL)
 	{
-		m_packages.update(["name": packname], ["$set": ["documentationURL": documentationURL]]);
+		m_packages.updateOne(["name": packname], ["$set": ["documentationURL": documentationURL]]);
 	}
 
 	bdata_t getPackageLogo(string packname, out bdata_t rev)
@@ -237,13 +243,13 @@ class DbController {
 	void removeVersion(string packname, string ver)
 	{
 		assert(ver.startsWith("~") || ver.isValidVersion());
-		m_packages.update(["name": packname], ["$pull": ["versions": ["version": ver]]]);
+		m_packages.updateOne(["name": packname], ["$pull": ["versions": ["version": ver]]]);
 	}
 
 	void updateVersion(string packname, DbPackageVersion ver)
 	{
 		assert(ver.version_.startsWith("~") || ver.version_.isValidVersion());
-		m_packages.update(["name": packname, "versions.version": ver.version_], ["$set": ["versions.$": ver]]);
+		m_packages.updateOne(["name": packname, "versions.version": ver.version_], ["$set": ["versions.$": ver]]);
 	}
 
 	bool hasVersion(string packname, string ver)
@@ -306,7 +312,7 @@ class DbController {
 		download.version_ = ver;
 		download.time = Clock.currTime(UTC());
 		download.userAgent = user_agent;
-		m_downloads.insert(download);
+		m_downloads.insertOne(download);
 		return download._id;
 	}
 
@@ -323,7 +329,7 @@ class DbController {
 	{
 		stats.updatedAt = Clock.currTime(UTC());
 		logDebug("updatePackageStats(%s, %s)", packId, stats);
-		m_packages.update(["_id": packId], ["$set": ["stats": stats]]);
+		m_packages.updateOne(["_id": packId], ["$set": ["stats": stats]]);
 	}
 
 	DbDownloadStats aggregateDownloadStats(BsonObjectID packId, string ver = null)
@@ -417,7 +423,7 @@ class DbController {
 				.uniq!((a, b) => a.version_ == b.version_)
 				.array;
 			if (p.versions != newversions)
-				m_packages.update(["_id": p._id], ["$set": ["versions": newversions]]);
+				m_packages.updateOne(["_id": p._id], ["$set": ["versions": newversions]]);
 		}
 	}
 }
diff --git a/source/dubregistry/mongodb.d b/source/dubregistry/mongodb.d
index 8d8bdec2..8006db06 100644
--- a/source/dubregistry/mongodb.d
+++ b/source/dubregistry/mongodb.d
@@ -4,6 +4,7 @@ import vibe.core.log;
 import vibe.db.mongo.client : MongoClient;
 import vibe.db.mongo.mongo : connectMongoDB;
 import vibe.db.mongo.settings : MongoClientSettings, MongoAuthMechanism, parseMongoDBUrl;
+import std.exception : enforce;
 import std.typecons : Nullable;
 
 string databaseName = "vpmreg";
@@ -17,7 +18,9 @@ MongoClientSettings mongoSettings() {
 		auto mongodbURI = environment.get("MONGODB_URI", environment.get("MONGO_URI", "mongodb://127.0.0.1"));
 		logInfo("Found mongodbURI: %s", mongodbURI);
 		MongoClientSettings settings;
-		parseMongoDBUrl(settings, mongodbURI);
+		enforce(parseMongoDBUrl(settings, mongodbURI),
+				"Could not parse connection string (check MONGODB_URI or MONGO_URI): "
+				~ mongodbURI);
 		settings.authMechanism = MongoAuthMechanism.scramSHA1;
 		if (settings.database.length > 0)
 			databaseName = settings.database;