diff --git a/lib/linear/mutations.rb b/lib/linear/mutations.rb
index 5f34e602b..7e43a9e50 100644
--- a/lib/linear/mutations.rb
+++ b/lib/linear/mutations.rb
@@ -2,8 +2,9 @@ module Linear::Mutations
   def self.graphql_value(value)
     case value
     when String
-      # Strings must be enclosed in double quotes
-      "\"#{value.gsub("\n", '\\n')}\""
+      # Strings must be enclosed in double quotes and properly escaped
+      escaped = value.gsub('\\', '\\\\').gsub('"', '\\"').gsub("\n", '\\n').gsub("\r", '\\r').gsub("\t", '\\t')
+      "\"#{escaped}\""
     when Array
       # Arrays need to be recursively converted
       "[#{value.map { |v| graphql_value(v) }.join(', ')}]"