diff --git a/.travis.yml b/.travis.yml
index cb4bcbf..44641af 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,8 @@
-
 language: php
 
 php:
   - '7.0'
-  - '7.2.0RC5'
+  - '7.2'
 
 git:
   depth: 10
diff --git a/benchmarks/parsing.php b/benchmarks/parsing.php
index bb7c3c4..2f66002 100644
--- a/benchmarks/parsing.php
+++ b/benchmarks/parsing.php
@@ -51,11 +51,7 @@ foreach($frameworks as $framework) {
         $definitionResolver = new DefinitionResolver($index);
         $parser = new PhpParser\Parser();
 
-        try {
-            $document = new PhpDocument($testCaseFile, $fileContents, $index, $parser, $docBlockFactory, $definitionResolver);
-        } catch (\Throwable $e) {
-            continue;
-        }
+        $document = new PhpDocument($testCaseFile, $fileContents, $index, $parser, $docBlockFactory, $definitionResolver);
     }
 
     echo "------------------------------\n";
diff --git a/dependencies.yml b/dependencies.yml
index bf6bd77..9df6f74 100644
--- a/dependencies.yml
+++ b/dependencies.yml
@@ -10,9 +10,6 @@ collectors:
       commit_message_prefix: "chore: "
 - type: js-npm
   path: /
-  settings:
-    dist_tags:
-      semantic-release: next
   actors:
   - type: js-npm
     versions: "Y.0.0"
diff --git a/src/Cache/FileSystemCache.php b/src/Cache/FileSystemCache.php
index 5e9f523..d6d4410 100644
--- a/src/Cache/FileSystemCache.php
+++ b/src/Cache/FileSystemCache.php
@@ -3,7 +3,6 @@ declare(strict_types = 1);
 
 namespace LanguageServer\Cache;
 
-use LanguageServer\LanguageClient;
 use Sabre\Event\Promise;
 
 /**
diff --git a/src/Client/TextDocument.php b/src/Client/TextDocument.php
index 176c4fd..f163d60 100644
--- a/src/Client/TextDocument.php
+++ b/src/Client/TextDocument.php
@@ -4,7 +4,7 @@ declare(strict_types = 1);
 namespace LanguageServer\Client;
 
 use LanguageServer\ClientHandler;
-use LanguageServer\Protocol\{Message, TextDocumentItem, TextDocumentIdentifier};
+use LanguageServer\Protocol\{TextDocumentItem, TextDocumentIdentifier};
 use Sabre\Event\Promise;
 use JsonMapper;
 
diff --git a/src/Client/Window.php b/src/Client/Window.php
index 053f306..c3558f5 100644
--- a/src/Client/Window.php
+++ b/src/Client/Window.php
@@ -4,7 +4,6 @@ declare(strict_types = 1);
 namespace LanguageServer\Client;
 
 use LanguageServer\ClientHandler;
-use LanguageServer\Protocol\Message;
 use Sabre\Event\Promise;
 
 /**
diff --git a/src/Client/XCache.php b/src/Client/XCache.php
index 3004e58..b3ce5a5 100644
--- a/src/Client/XCache.php
+++ b/src/Client/XCache.php
@@ -4,7 +4,6 @@ declare(strict_types = 1);
 namespace LanguageServer\Client;
 
 use LanguageServer\ClientHandler;
-use LanguageServer\Protocol\Message;
 use Sabre\Event\Promise;
 
 /**
diff --git a/src/Definition.php b/src/Definition.php
index 0d157cb..1600408 100644
--- a/src/Definition.php
+++ b/src/Definition.php
@@ -6,7 +6,6 @@ namespace LanguageServer;
 use LanguageServer\Index\ReadableIndex;
 use phpDocumentor\Reflection\{Types, Type, Fqsen, TypeResolver};
 use LanguageServer\Protocol\SymbolInformation;
-use Exception;
 use Generator;
 
 /**
@@ -69,7 +68,7 @@ class Definition
     public $canBeInstantiated;
 
     /**
-     * @var Protocol\SymbolInformation
+     * @var SymbolInformation
      */
     public $symbolInformation;
 
diff --git a/src/FqnUtilities.php b/src/FqnUtilities.php
index 5b3d523..57e3776 100644
--- a/src/FqnUtilities.php
+++ b/src/FqnUtilities.php
@@ -3,7 +3,6 @@
 namespace LanguageServer\FqnUtilities;
 
 use phpDocumentor\Reflection\{Type, Types};
-use Microsoft\PhpParser;
 
 /**
  * Returns all possible FQNs in a type
diff --git a/src/Indexer.php b/src/Indexer.php
index 2618d43..a556d4d 100644
--- a/src/Indexer.php
+++ b/src/Indexer.php
@@ -6,10 +6,8 @@ namespace LanguageServer;
 use LanguageServer\Cache\Cache;
 use LanguageServer\FilesFinder\FilesFinder;
 use LanguageServer\Index\{DependenciesIndex, Index};
-use LanguageServer\Protocol\Message;
 use LanguageServer\Protocol\MessageType;
 use Webmozart\PathUtil\Path;
-use Composer\Semver\VersionParser;
 use Sabre\Event\Promise;
 use function Sabre\Event\coroutine;
 
diff --git a/src/PhpDocument.php b/src/PhpDocument.php
index 0ac8421..805bc08 100644
--- a/src/PhpDocument.php
+++ b/src/PhpDocument.php
@@ -160,7 +160,9 @@ class PhpDocument
 
         // Register this document on the project for references
         foreach ($this->referenceNodes as $fqn => $nodes) {
-            $this->index->addReferenceUri($fqn, $this->uri);
+            // Cast the key to string. If (string)'2' is set as an array index, it will read out as (int)2. We must
+            // deal with incorrect code, so this is a valid scenario.
+            $this->index->addReferenceUri((string)$fqn, $this->uri);
         }
 
         $this->sourceFileNode = $treeAnalyzer->getSourceFileNode();
diff --git a/src/Protocol/SymbolInformation.php b/src/Protocol/SymbolInformation.php
index 6b4d39e..499e417 100644
--- a/src/Protocol/SymbolInformation.php
+++ b/src/Protocol/SymbolInformation.php
@@ -4,7 +4,6 @@ namespace LanguageServer\Protocol;
 
 use Microsoft\PhpParser;
 use Microsoft\PhpParser\Node;
-use Exception;
 
 /**
  * Represents information about programming constructs like variables, classes,
diff --git a/src/ProtocolStreamWriter.php b/src/ProtocolStreamWriter.php
index 3f51e14..f004a5f 100644
--- a/src/ProtocolStreamWriter.php
+++ b/src/ProtocolStreamWriter.php
@@ -8,7 +8,6 @@ use Sabre\Event\{
     Loop,
     Promise
 };
-use RuntimeException;
 
 class ProtocolStreamWriter implements ProtocolWriter
 {
diff --git a/src/Server/TextDocument.php b/src/Server/TextDocument.php
index 362dc34..2ded56d 100644
--- a/src/Server/TextDocument.php
+++ b/src/Server/TextDocument.php
@@ -23,7 +23,6 @@ use LanguageServer\Protocol\{
     VersionedTextDocumentIdentifier,
     CompletionContext
 };
-use Microsoft\PhpParser;
 use Microsoft\PhpParser\Node;
 use Sabre\Event\Promise;
 use Sabre\Uri;
diff --git a/src/Server/Workspace.php b/src/Server/Workspace.php
index fe1dda6..082c502 100644
--- a/src/Server/Workspace.php
+++ b/src/Server/Workspace.php
@@ -3,18 +3,16 @@ declare(strict_types = 1);
 
 namespace LanguageServer\Server;
 
-use LanguageServer\{LanguageClient, Project, PhpDocumentLoader};
+use LanguageServer\{LanguageClient, PhpDocumentLoader};
 use LanguageServer\Index\{ProjectIndex, DependenciesIndex, Index};
 use LanguageServer\Protocol\{
     FileChangeType,
     FileEvent,
     SymbolInformation,
     SymbolDescriptor,
-    PackageDescriptor,
     ReferenceInformation,
     DependencyReference,
-    Location,
-    MessageType
+    Location
 };
 use Sabre\Event\Promise;
 use function Sabre\Event\coroutine;
diff --git a/src/SignatureHelpProvider.php b/src/SignatureHelpProvider.php
index aba02b4..439be9c 100644
--- a/src/SignatureHelpProvider.php
+++ b/src/SignatureHelpProvider.php
@@ -7,10 +7,8 @@ use LanguageServer\Index\ReadableIndex;
 use LanguageServer\Protocol\{
     Position,
     SignatureHelp,
-    SignatureInformation,
     ParameterInformation
 };
-use Microsoft\PhpParser;
 use Microsoft\PhpParser\Node;
 use Sabre\Event\Promise;
 use function Sabre\Event\coroutine;
diff --git a/src/TreeAnalyzer.php b/src/TreeAnalyzer.php
index 465f5bb..03ad539 100644
--- a/src/TreeAnalyzer.php
+++ b/src/TreeAnalyzer.php
@@ -3,10 +3,8 @@ declare(strict_types = 1);
 
 namespace LanguageServer;
 
-use LanguageServer\Protocol\{Diagnostic, DiagnosticSeverity, Range, Position, TextEdit};
-use LanguageServer\Index\Index;
+use LanguageServer\Protocol\{Diagnostic, DiagnosticSeverity, Range, Position};
 use phpDocumentor\Reflection\DocBlockFactory;
-use Sabre\Uri;
 use Microsoft\PhpParser;
 use Microsoft\PhpParser\Node;
 use Microsoft\PhpParser\Token;