diff --git a/CHANGELOG.adoc b/CHANGELOG.adoc
index 231cbb518e..d538cf0b87 100644
--- a/CHANGELOG.adoc
+++ b/CHANGELOG.adoc
@@ -1,3 +1,9 @@
+= 0.7.0-beta.3
+
+== DFX
+
+=== fix: assets with an unrecognized file extension will use content-type "application/octet-stream"
+
 = 0.7.0-beta.2
 
 == DFX
diff --git a/e2e/tests-dfx/assetscanister.bash b/e2e/tests-dfx/assetscanister.bash
index eeea4755ad..01032fca04 100644
--- a/e2e/tests-dfx/assetscanister.bash
+++ b/e2e/tests-dfx/assetscanister.bash
@@ -179,6 +179,7 @@ CHERRIES" "$stdout"
     touch src/e2e_project_assets/assets/main.css
     touch src/e2e_project_assets/assets/index.js.map
     touch src/e2e_project_assets/assets/index.js.LICENSE.txt
+    touch src/e2e_project_assets/assets/index.js.LICENSE
 
     dfx build
     dfx canister install e2e_project_assets
@@ -197,6 +198,8 @@ CHERRIES" "$stdout"
     assert_match 'content_type = "text/plain"'
     assert_command dfx canister call --query e2e_project_assets get '(record{key="/index.js.LICENSE.txt";accept_encodings=vec{"identity"}})'
     assert_match 'content_type = "text/plain"'
+    assert_command dfx canister call --query e2e_project_assets get '(record{key="/index.js.LICENSE";accept_encodings=vec{"identity"}})'
+    assert_match 'content_type = "application/octet-stream"'
 }
 
 @test "deletes assets that are removed from project" {
diff --git a/src/dfx/src/lib/installers/assets.rs b/src/dfx/src/lib/installers/assets.rs
index 62814dbc37..74d90c6bbf 100644
--- a/src/dfx/src/lib/installers/assets.rs
+++ b/src/dfx/src/lib/installers/assets.rs
@@ -4,7 +4,6 @@ use crate::lib::error::{DfxError, DfxResult};
 use crate::lib::waiter::waiter_with_timeout;
 use candid::{CandidType, Decode, Encode, Nat};
 
-use anyhow::anyhow;
 use delay::{Delay, Waiter};
 use ic_agent::Agent;
 use ic_types::Principal;
@@ -266,12 +265,7 @@ async fn make_project_asset(
 
     let media_type = mime_guess::from_path(&asset_location.source)
         .first()
-        .ok_or_else(|| {
-            anyhow!(
-                "Unable to determine content type for '{}'.",
-                asset_location.source.to_string_lossy()
-            )
-        })?;
+        .unwrap_or(mime::APPLICATION_OCTET_STREAM);
 
     let mut encodings = HashMap::new();