diff --git a/src/aaas.json b/src/aaas.json
index 793079d..f5f0344 100644
--- a/src/aaas.json
+++ b/src/aaas.json
@@ -15,7 +15,7 @@
       "open_access": false,
       "issn": "1095-9203",
       "urls": {
-        "pdf": "http://science.sciencemag.org/content/%s/%s/%s.full.pdf"
+        "pdf": "https://science.sciencemag.org/content/%s/%s/%s.full.pdf"
       },
       "components": {
         "html": {
@@ -41,7 +41,7 @@
       "open_access": true,
       "issn": "2375-2548",
       "urls": {
-        "pdf": "http://advances.sciencemag.org/content/advances/%s/%s/e%s.full.pdf"
+        "pdf": "https://advances.sciencemag.org/content/advances/%s/%s/e%s.full.pdf"
       },
       "components": {
         "html": {
@@ -65,7 +65,7 @@
       "open_access": false,
       "issn": "1946-6242",
       "urls": {
-        "pdf": "http://stm.sciencemag.org/content/advances/%s/%s/e%s.full.pdf"
+        "pdf": "https://stm.sciencemag.org/content/advances/%s/%s/e%s.full.pdf"
       },
       "components": {
         "html": {
@@ -89,9 +89,9 @@
     {
       "name": "science-signaling",
       "open_access": false,
-      "issn": "1937-9145",
+      "issn": ["1937-9145", "1525-8882"],
       "urls": {
-        "pdf": "http://stke.sciencemag.org/content/advances/%s/%s/e%s.full.pdf"
+        "pdf": "https://stke.sciencemag.org/content/%s/%s/%s.full.pdf"
       },
       "components": {
         "html": {
diff --git a/src/elsevier.json b/src/elsevier.json
index 314e3dd..a92d91d 100644
--- a/src/elsevier.json
+++ b/src/elsevier.json
@@ -31,8 +31,8 @@
     "10.3182"
   ],
   "urls": {
-    "xml": "http://api.elsevier.com/content/article/PII:%s?httpAccept=text/xml",
-    "plain": "http://api.elsevier.com/content/article/PII:%s?httpAccept=text/plain"
+    "xml": "https://api.elsevier.com/content/article/PII:%s?httpAccept=text/xml",
+    "plain": "https://api.elsevier.com/content/article/PII:%s?httpAccept=text/plain"
   },
   "components": {
     "html": null,
diff --git a/src/iop.json b/src/iop.json
index 36bbb75..c17896e 100644
--- a/src/iop.json
+++ b/src/iop.json
@@ -7,7 +7,7 @@
     "10.1088"
   ],
   "urls": {
-    "pdf": "http://iopscience.iop.org/article/%s/pdf"
+    "pdf": "https://iopscience.iop.org/article/%s/pdf"
   },
   "components": {
     "html": null,