diff --git a/fluent-bundle/CHANGELOG.md b/fluent-bundle/CHANGELOG.md
index 245ba778..b26d4355 100644
--- a/fluent-bundle/CHANGELOG.md
+++ b/fluent-bundle/CHANGELOG.md
@@ -4,6 +4,16 @@
 
   - …
 
+## fluent-bundle 0.13.0 (September 24, 2020)
+  - Update to `fluent-syntax` 0.10.
+  - Add `FluentBundle::write_pattern` which can write to pre-allocated buffer.
+  - Get rid of `DisplayableNode` and simplify `FluentValue`.
+  - Reorganize `Resolver` around `impl Write`.
+  - Introduce `FluentArgs` as a struct over `Vec<FluentArg>`.
+  - Introduce `FluentMessage` and `FluentAttributes`.
+  - Make `FluentArgs` accept `Cow<str>` as keys.
+
+
 ## fluent-bundle 0.12.0 (May 6, 2020)
   - Add `Send` to `FluentType::Custom` (#173)
   - Update `intl-pluralrules` to 7.0.
diff --git a/fluent-bundle/Cargo.toml b/fluent-bundle/Cargo.toml
index 55fe58d0..86451bf3 100644
--- a/fluent-bundle/Cargo.toml
+++ b/fluent-bundle/Cargo.toml
@@ -4,7 +4,7 @@ description = """
 A localization system designed to unleash the entire expressive power of
 natural language translations.
 """
-version = "0.12.0"
+version = "0.13.0"
 edition = "2018"
 authors = [
     "Zibi Braniecki <gandalf@mozilla.com>",
@@ -25,10 +25,10 @@ include = [
 
 [dependencies]
 fluent-langneg = "0.13"
-fluent-syntax = { version = "0.9", path = "../fluent-syntax" }
+fluent-syntax = { version = "0.10", path = "../fluent-syntax" }
 intl_pluralrules = "7.0"
 rental = "0.5"
-smallvec = "1.0"
+smallvec = "1"
 unic-langid = "0.9"
 intl-memoizer = { version = "0.5", path = "../intl-memoizer" }
 
diff --git a/fluent-bundle/benches/resolver.rs b/fluent-bundle/benches/resolver.rs
index e550e327..2ca4a009 100644
--- a/fluent-bundle/benches/resolver.rs
+++ b/fluent-bundle/benches/resolver.rs
@@ -88,7 +88,9 @@ fn resolver_bench(c: &mut Criterion) {
     let ftl_strings = get_strings(tests);
 
     let mut group = c.benchmark_group("resolve");
-    for (name, source) in &ftl_strings {
+    for name in tests {
+        let source = ftl_strings.get(name)
+            .expect("Failed to find the source.");
         group.bench_with_input(BenchmarkId::from_parameter(name), &source, |b, source| {
             let (bundle, ids) = get_bundle(name, source);
             let args = get_args(name);
@@ -113,7 +115,9 @@ fn resolver_bench(c: &mut Criterion) {
     group.finish();
 
     let mut group = c.benchmark_group("resolve_to_str");
-    for (name, source) in &ftl_strings {
+    for name in tests {
+        let source = ftl_strings.get(name)
+            .expect("Failed to find the source.");
         group.bench_with_input(BenchmarkId::from_parameter(name), &source, |b, source| {
             let (bundle, ids) = get_bundle(name, source);
             let args = get_args(name);
diff --git a/fluent-bundle/src/args.rs b/fluent-bundle/src/args.rs
index 837785d6..2ba991ca 100644
--- a/fluent-bundle/src/args.rs
+++ b/fluent-bundle/src/args.rs
@@ -13,6 +13,10 @@ impl<'args> FluentArgs<'args> {
         Self(vec![])
     }
 
+    pub fn with_capacity(capacity: usize) -> Self {
+        Self(Vec::with_capacity(capacity))
+    }
+
     pub fn get(&self, key: &str) -> Option<&FluentValue<'args>> {
         self.0.iter().find(|(k, _)| key == *k).map(|(_, v)| v)
     }
diff --git a/fluent-fallback/Cargo.toml b/fluent-fallback/Cargo.toml
index 4e5a1edf..a869b67a 100644
--- a/fluent-fallback/Cargo.toml
+++ b/fluent-fallback/Cargo.toml
@@ -18,7 +18,7 @@ keywords = ["localization", "l10n", "i18n", "intl", "internationalization"]
 categories = ["localization", "internationalization"]
 
 [dependencies]
-fluent-bundle = { version = "0.12", path = "../fluent-bundle" }
+fluent-bundle = { version = "0.13", path = "../fluent-bundle" }
 reiterate = "0.1.3"
 
 [dev-dependencies]
diff --git a/fluent-resmgr/Cargo.toml b/fluent-resmgr/Cargo.toml
index 49d73862..97d52095 100644
--- a/fluent-resmgr/Cargo.toml
+++ b/fluent-resmgr/Cargo.toml
@@ -17,7 +17,7 @@ keywords = ["localization", "l10n", "i18n", "intl", "internationalization"]
 categories = ["localization", "internationalization"]
 
 [dependencies]
-fluent-bundle = { version = "0.12", path = "../fluent-bundle" }
+fluent-bundle = { version = "0.13", path = "../fluent-bundle" }
 unic-langid = "0.9"
 fluent-fallback = { version = "0.0.4", path = "../fluent-fallback" }
 elsa = "1.3.2"
diff --git a/fluent/CHANGELOG.md b/fluent/CHANGELOG.md
index adf95d34..39b2982a 100644
--- a/fluent/CHANGELOG.md
+++ b/fluent/CHANGELOG.md
@@ -4,6 +4,9 @@
 
   - …
 
+## fluent 0.13.0 (May 6, 2020)
+  - Update `fluent-bundle` to 0.13.0.
+
 ## fluent 0.12.0 (May 6, 2020)
   - Update `fluent-bundle` to 0.12.0.
   - Update `unic-langid` to 0.9.0.
diff --git a/fluent/Cargo.toml b/fluent/Cargo.toml
index 4659df2b..bab9f212 100644
--- a/fluent/Cargo.toml
+++ b/fluent/Cargo.toml
@@ -4,7 +4,7 @@ description = """
 A localization system designed to unleash the entire expressive power of
 natural language translations.
 """
-version = "0.12.0"
+version = "0.13.0"
 edition = "2018"
 authors = [
     "Zibi Braniecki <gandalf@mozilla.com>",
@@ -24,6 +24,6 @@ include = [
 ]
 
 [dependencies]
-fluent-bundle = { version = "0.12", path = "../fluent-bundle" }
+fluent-bundle = { version = "0.13", path = "../fluent-bundle" }
 unic-langid = "0.9"
 fluent-pseudo = { version = "0.2", optional = true }