diff --git a/plugins/src/main/java/com/google/firebase/gradle/plugins/ci/AffectedProjectFinder.java b/plugins/src/main/java/com/google/firebase/gradle/plugins/ci/AffectedProjectFinder.java
index 699dd5c1c7a..c6d5d9500a0 100644
--- a/plugins/src/main/java/com/google/firebase/gradle/plugins/ci/AffectedProjectFinder.java
+++ b/plugins/src/main/java/com/google/firebase/gradle/plugins/ci/AffectedProjectFinder.java
@@ -16,6 +16,7 @@
 
 import com.google.common.collect.ImmutableSet;
 import com.google.common.io.CharStreams;
+import com.google.common.io.Files;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStreamReader;
@@ -39,6 +40,8 @@ public AffectedProjectFinder(Project project, List<Pattern> ignorePaths) {
     this(project, changedPaths(project.getRootDir()), ignorePaths);
   }
 
+  private static final Set<String> DOC_EXTENSIONS = ImmutableSet.of("md", "txt", "html");
+
   public AffectedProjectFinder(
       Project project, Set<String> changedPaths, List<Pattern> ignorePaths) {
     this.project = project;
@@ -53,9 +56,17 @@ public AffectedProjectFinder(
                   }
                   return true;
                 })
+            .filter(p -> !isDocFile(p))
             .collect(Collectors.toSet());
   }
 
+  private static boolean isDocFile(String path) {
+    if (path.startsWith("docs/")) {
+      return true;
+    }
+    return DOC_EXTENSIONS.contains(Files.getFileExtension(path));
+  }
+
   Set<Project> find() {
     Set<String> paths = new HashSet<>(changedPaths);
     Set<Project> projects = changedSubProjects(project, paths);