diff --git a/homeassistant/components/elmax/config_flow.py b/homeassistant/components/elmax/config_flow.py
index 3bb01efd3d5..09e0bc0d260 100644
--- a/homeassistant/components/elmax/config_flow.py
+++ b/homeassistant/components/elmax/config_flow.py
@@ -151,7 +151,9 @@ class ElmaxConfigFlow(ConfigFlow, domain=DOMAIN):
                     port=self._panel_direct_port,
                 )
             )
-            ssl_context = build_direct_ssl_context(cadata=self._panel_direct_ssl_cert)
+            ssl_context = await self.hass.async_add_executor_job(
+                build_direct_ssl_context, self._panel_direct_ssl_cert
+            )
 
         # Attempt the connection to make sure the pin works. Also, take the chance to retrieve the panel ID via APIs.
         client_api_url = get_direct_api_url(
diff --git a/homeassistant/components/elmax/manifest.json b/homeassistant/components/elmax/manifest.json
index dfa20326d0c..f4b184c0475 100644
--- a/homeassistant/components/elmax/manifest.json
+++ b/homeassistant/components/elmax/manifest.json
@@ -6,7 +6,7 @@
   "documentation": "https://www.home-assistant.io/integrations/elmax",
   "iot_class": "cloud_polling",
   "loggers": ["elmax_api"],
-  "requirements": ["elmax-api==0.0.6.3"],
+  "requirements": ["elmax-api==0.0.6.4rc0"],
   "zeroconf": [
     {
       "type": "_elmax-ssl._tcp.local."
diff --git a/requirements_all.txt b/requirements_all.txt
index 0dfb3bd664e..8eb3ce91c83 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -827,7 +827,7 @@ eliqonline==1.2.2
 elkm1-lib==2.2.10
 
 # homeassistant.components.elmax
-elmax-api==0.0.6.3
+elmax-api==0.0.6.4rc0
 
 # homeassistant.components.elvia
 elvia==0.1.0
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 6a3fcda134a..53c15a4d0cb 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -702,7 +702,7 @@ elgato==5.1.2
 elkm1-lib==2.2.10
 
 # homeassistant.components.elmax
-elmax-api==0.0.6.3
+elmax-api==0.0.6.4rc0
 
 # homeassistant.components.elvia
 elvia==0.1.0