diff --git a/curseforge/src/main/kotlin/net/xolt/freecam/publish/platforms/CurseForgeClient.kt b/curseforge/src/main/kotlin/net/xolt/freecam/publish/platforms/CurseForgeClient.kt
index fc88b46..ee21a5e 100644
--- a/curseforge/src/main/kotlin/net/xolt/freecam/publish/platforms/CurseForgeClient.kt
+++ b/curseforge/src/main/kotlin/net/xolt/freecam/publish/platforms/CurseForgeClient.kt
@@ -32,7 +32,10 @@ internal class CurseForgeClient(
         logger,
     )
 
-     suspend fun uploadFile(spec: ReleaseArtifact) = uploadFile(spec.artifact.toFile()) {
+     suspend fun uploadFile(
+         spec: ReleaseArtifact,
+         excludeVersions: List<String> = emptyList(),
+     ) = uploadFile(spec.artifact.toFile()) {
          displayName(spec.displayName)
          releaseType(spec.versionType.toCurseForge())
 
@@ -45,7 +48,7 @@ internal class CurseForgeClient(
              spec.loaders,
              spec.curseForgeEnvironments,
              spec.curseForgeJavaVersions,
-             spec.curseForgeMinecraftVersions,
+             spec.curseForgeMinecraftVersions.filterNot(excludeVersions::contains),
          ).flatten().forEach(::addGameVersion)
 
          spec.relationships.forEach { (slug, _, type) ->
diff --git a/curseforge/src/main/kotlin/net/xolt/freecam/publish/platforms/CurseForgePlatform.kt b/curseforge/src/main/kotlin/net/xolt/freecam/publish/platforms/CurseForgePlatform.kt
index ca29a0e..fc7bae2 100644
--- a/curseforge/src/main/kotlin/net/xolt/freecam/publish/platforms/CurseForgePlatform.kt
+++ b/curseforge/src/main/kotlin/net/xolt/freecam/publish/platforms/CurseForgePlatform.kt
@@ -32,8 +32,25 @@ internal class DefaultCurseForgePlatform(
 
     override suspend fun publishRelease(metadata: ReleaseMetadata, artifacts: List<ReleaseArtifact>) {
         artifacts.forEach { spec ->
-            logger.info { "publishing artifact ${spec.name}" }
-            client.uploadFile(spec)
+            try {
+                logger.info { "publishing artifact ${spec.name}" }
+                client.uploadFile(spec)
+            } catch (e: IllegalArgumentException /* TODO: InvalidCurseVersionException */) {
+                val infix = " is not a valid game version."
+                e.message?.takeIf { infix in it }?.let { msg ->
+                    // TODO: CurseUpload4J 1.1.1's `InvalidCurseVersionException` will list all invalid versions.
+                    val invalid = listOf(msg.substringBefore(infix))
+
+                    // CurseForge has flaky support for snapshot versions,
+                    // so retry if all invalid versions end in '-snapshot'.
+                    if (invalid.all { it.endsWith("-snapshot") }) {
+                        logger.warn { "retrying ${spec.name} without invalid snapshot versions: $invalid" }
+                        client.uploadFile(spec, excludeVersions = invalid)
+                        return@forEach
+                    }
+                }
+                throw e
+            }
         }
     }
 }