diff --git a/internal/lsp/completion.go b/internal/lsp/completion.go
index f0d8bcb6..c2c8cda8 100644
--- a/internal/lsp/completion.go
+++ b/internal/lsp/completion.go
@@ -46,6 +46,7 @@ func toProtocolCompletionItems(candidates []source.CompletionItem, prefix string
 					End:   pos,
 				},
 			},
+			InsertTextFormat: insertTextFormat,
 			// This is a hack so that the client sorts completion results in the order
 			// according to their score. This can be removed upon the resolution of
 			// https://github.com/Microsoft/language-server-protocol/issues/348.
diff --git a/internal/lsp/protocol/tsprotocol.go b/internal/lsp/protocol/tsprotocol.go
index c0cba77f..11962acf 100644
--- a/internal/lsp/protocol/tsprotocol.go
+++ b/internal/lsp/protocol/tsprotocol.go
@@ -1017,8 +1017,11 @@ type InnerClientCapabilities struct {
 	Experimental interface{} `json:"experimental,omitempty"`
 }
 
-// ClientCapabilities is:
-type ClientCapabilities struct {
+// TODO(rstambler): Remove this when golang.org/issue/31090 is resolved.
+type ClientCapabilities map[string]interface{}
+
+// clientCapabilities is:
+type clientCapabilities struct {
 	InnerClientCapabilities
 	ImplementationClientCapabilities
 	TypeDefinitionClientCapabilities
diff --git a/internal/lsp/server.go b/internal/lsp/server.go
index c3e50905..0ea00852 100644
--- a/internal/lsp/server.go
+++ b/internal/lsp/server.go
@@ -93,9 +93,14 @@ func (s *Server) Initialize(ctx context.Context, params *protocol.InitializePara
 	s.initialized = true // mark server as initialized now
 
 	// Check if the client supports snippets in completion items.
-	capText := params.Capabilities.InnerClientCapabilities.TextDocument
-	if capText != nil && capText.Completion != nil && capText.Completion.CompletionItem != nil {
-		s.snippetsSupported = capText.Completion.CompletionItem.SnippetSupport
+	if x, ok := params.Capabilities["textDocument"].(map[string]interface{}); ok {
+		if x, ok := x["completion"].(map[string]interface{}); ok {
+			if x, ok := x["completionItem"].(map[string]interface{}); ok {
+				if x, ok := x["snippetSupport"].(bool); ok {
+					s.snippetsSupported = x
+				}
+			}
+		}
 	}
 	s.signatureHelpEnabled = true