diff --git a/Cargo.toml b/Cargo.toml
index 38b698d71..4c2a7cb81 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -100,7 +100,7 @@ mime_guess = { version = "2.0", default-features = false, optional = true }
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 encoding_rs = "0.8"
 http-body = "0.4.0"
-hyper = { version = "0.14.18", default-features = false, features = ["tcp", "http1", "http2", "client", "runtime"] }
+hyper = { version = "0.14.21", default-features = false, features = ["tcp", "http1", "http2", "client", "runtime"] }
 h2 = "0.3.10"
 once_cell = "1"
 log = "0.4"
diff --git a/src/async_impl/client.rs b/src/async_impl/client.rs
index 8fa363c58..c7e605008 100644
--- a/src/async_impl/client.rs
+++ b/src/async_impl/client.rs
@@ -120,6 +120,7 @@ struct Config {
     http09_responses: bool,
     http1_title_case_headers: bool,
     http1_allow_obsolete_multiline_headers_in_responses: bool,
+    http1_ignore_invalid_headers_in_responses: bool,
     http2_initial_stream_window_size: Option<u32>,
     http2_initial_connection_window_size: Option<u32>,
     http2_adaptive_window: bool,
@@ -201,6 +202,7 @@ impl ClientBuilder {
                 http09_responses: false,
                 http1_title_case_headers: false,
                 http1_allow_obsolete_multiline_headers_in_responses: false,
+                http1_ignore_invalid_headers_in_responses: false,
                 http2_initial_stream_window_size: None,
                 http2_initial_connection_window_size: None,
                 http2_adaptive_window: false,
@@ -620,6 +622,10 @@ impl ClientBuilder {
             builder.http1_allow_obsolete_multiline_headers_in_responses(true);
         }
 
+        if config.http1_ignore_invalid_headers_in_responses {
+            builder.http1_ignore_invalid_headers_in_responses(true);
+        }
+
         let proxies_maybe_http_auth = proxies.iter().any(|p| p.maybe_has_http_auth());
 
         Ok(Client {
@@ -1015,6 +1021,12 @@ impl ClientBuilder {
         self
     }
 
+    /// Sets whether invalid header lines should be silently ignored in HTTP/1 responses.
+    pub fn http1_ignore_invalid_headers_in_responses(mut self, value: bool) -> ClientBuilder {
+        self.config.http1_ignore_invalid_headers_in_responses = value;
+        self
+    }
+
     /// Only use HTTP/1.
     pub fn http1_only(mut self) -> ClientBuilder {
         self.config.http_version_pref = HttpVersionPref::Http1;
@@ -1873,6 +1885,10 @@ impl Config {
             f.field("http1_allow_obsolete_multiline_headers_in_responses", &true);
         }
 
+        if self.http1_ignore_invalid_headers_in_responses {
+            f.field("http1_ignore_invalid_headers_in_responses", &true);
+        }
+
         if matches!(self.http_version_pref, HttpVersionPref::Http1) {
             f.field("http1_only", &true);
         }
diff --git a/src/blocking/client.rs b/src/blocking/client.rs
index e6ec6735a..6d954fd97 100644
--- a/src/blocking/client.rs
+++ b/src/blocking/client.rs
@@ -420,6 +420,11 @@ impl ClientBuilder {
         self.with_inner(|inner| inner.http1_allow_obsolete_multiline_headers_in_responses(value))
     }
 
+    /// Sets whether invalid header lines should be silently ignored in HTTP/1 responses.
+    pub fn http1_ignore_invalid_headers_in_responses(self, value: bool) -> ClientBuilder {
+        self.with_inner(|inner| inner.http1_ignore_invalid_headers_in_responses(value))
+    }
+
     /// Only use HTTP/1.
     pub fn http1_only(self) -> ClientBuilder {
         self.with_inner(|inner| inner.http1_only())