diff --git a/src/engine/mod.rs b/src/engine/mod.rs
index 2bd682d..0ed6c4a 100644
--- a/src/engine/mod.rs
+++ b/src/engine/mod.rs
@@ -1,3 +1,4 @@
+use std::collections::HashSet;
 use std::path::{Path, PathBuf};
 use std::sync::Arc;
 use std::time::Duration;
@@ -59,7 +60,11 @@ impl Engine {
         impl Future<Item=Vec<Repository>, Error=Error>
     {
         self.get_popular_repos.call(())
-            .from_err().map(|repos| repos.clone())
+            .from_err().map(|repos| {
+                repos.iter()
+                    .filter(|repo| !POPULAR_REPOS_BLACKLIST.contains(&repo.path))
+                    .cloned().collect()
+            })
     }
 
     pub fn analyze_dependencies(&self, repo_path: RepoPath) ->
@@ -96,3 +101,15 @@ impl Engine {
         retrieve_file_at_path(self.client.clone(), &repo_path, &path.as_ref().join("Cargo.toml")).from_err()
     }
 }
+
+lazy_static! {
+    static ref POPULAR_REPOS_BLACKLIST: HashSet<RepoPath> = {
+        vec![
+            RepoPath::from_parts("github", "rust-lang", "rust"),
+            RepoPath::from_parts("github", "google", "xi-editor"),
+            RepoPath::from_parts("github", "lk-geimfari", "awesomo"),
+            RepoPath::from_parts("github", "redox-os", "tfs"),
+            RepoPath::from_parts("github", "carols10cents", "rustlings")
+        ].into_iter().collect::<Result<HashSet<_>, _>>().unwrap()
+    };
+}
diff --git a/src/models/repo.rs b/src/models/repo.rs
index 41df4f7..d70a1c1 100644
--- a/src/models/repo.rs
+++ b/src/models/repo.rs
@@ -8,7 +8,7 @@ pub struct Repository {
     pub description: String
 }
 
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, Hash, PartialEq, Eq)]
 pub struct RepoPath {
     pub site: RepoSite,
     pub qual: RepoQualifier,
@@ -25,7 +25,7 @@ impl RepoPath {
     }
 }
 
-#[derive(Clone, Copy, Debug)]
+#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq)]
 pub enum RepoSite {
     Github
 }
@@ -57,7 +57,7 @@ impl AsRef<str> for RepoSite {
     }
 }
 
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, Hash, PartialEq, Eq)]
 pub struct RepoQualifier(String);
 
 impl FromStr for RepoQualifier {
@@ -79,7 +79,7 @@ impl AsRef<str> for RepoQualifier {
     }
 }
 
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, Hash, PartialEq, Eq)]
 pub struct RepoName(String);
 
 impl FromStr for RepoName {