diff --git a/requirements.consult_doi_request_and_extract_data.txt b/requirements.consult_doi_request_and_extract_data.txt
index 05e4711..c4a7553 100644
--- a/requirements.consult_doi_request_and_extract_data.txt
+++ b/requirements.consult_doi_request_and_extract_data.txt
@@ -11,4 +11,4 @@ python-dateutil==2.8.0
 pytz==2019.2
 query-string==2019.4.13
 six==1.12.0
-urllib3==1.25.3
+urllib3==1.26.5
diff --git a/requirements.generate_doi_not_found.txt b/requirements.generate_doi_not_found.txt
index 4400302..272852b 100644
--- a/requirements.generate_doi_not_found.txt
+++ b/requirements.generate_doi_not_found.txt
@@ -13,4 +13,4 @@ request==2019.4.13
 requests==2.22.0
 six==1.12.0
 tqdm==4.35.0
-urllib3==1.25.3
+urllib3==1.26.5