diff --git a/gradle.properties b/gradle.properties
index e4718f9..d9ab460 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -8,6 +8,9 @@ pluginVersion = 0.8.0
 
 # Supported build number ranges and IntelliJ Platform versions -> https://plugins.jetbrains.com/docs/intellij/build-number-ranges.html
 pluginSinceBuild = 253
+# Protobuf support is unbundled in 2026.3 (IJPL-252342) and Marketplace does not
+# yet resolve idea.plugin.protoeditor for 263 builds.
+pluginUntilBuild = 262.*
 
 # IntelliJ Platform Properties -> https://plugins.jetbrains.com/docs/intellij/tools-gradle-intellij-plugin.html#configuration-intellij-extension
 platformType = IU