diff --git a/app/src/main/res/raw/lf_session_cert.pem b/app/src/main/res/raw/lf_session_cert.pem
new file mode 100644
index 0000000000..344a055433
--- /dev/null
+++ b/app/src/main/res/raw/lf_session_cert.pem
@@ -0,0 +1,24 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/app/src/main/res/raw/seed1cert.pem b/app/src/main/res/raw/seed1cert.pem
new file mode 100644
index 0000000000..7360d6fca0
--- /dev/null
+++ b/app/src/main/res/raw/seed1cert.pem
@@ -0,0 +1,25 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/app/src/main/res/raw/seed3cert.pem b/app/src/main/res/raw/seed3cert.pem
new file mode 100644
index 0000000000..92574b769b
--- /dev/null
+++ b/app/src/main/res/raw/seed3cert.pem
@@ -0,0 +1,25 @@
+-----BEGIN CERTIFICATE-----
+MIIEITCCAwmgAwIBAgIUc486Dy9Y00bUFfDeYmJIgSS5xREwDQYJKoZIhvcNAQEL
+BQAwgYAxCzAJBgNVBAYTAkFVMREwDwYDVQQIDAhWaWN0b3JpYTESMBAGA1UEBwwJ
+TWVsYm91cm5lMSUwIwYDVQQKDBxPeGVuIFByaXZhY3kgVGVjaCBGb3VuZGF0aW9u
+MSMwIQYDVQQDDBpzdG9yYWdlLnNlZWQzLmxva2kubmV0d29yazAeFw0yMTA0MDcw
+MTIwNTJaFw0yMzA0MDcwMTIwNTJaMIGAMQswCQYDVQQGEwJBVTERMA8GA1UECAwI
+VmljdG9yaWExEjAQBgNVBAcMCU1lbGJvdXJuZTElMCMGA1UECgwcT3hlbiBQcml2
+YWN5IFRlY2ggRm91bmRhdGlvbjEjMCEGA1UEAwwac3RvcmFnZS5zZWVkMy5sb2tp
+Lm5ldHdvcmswggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCtokMlsFzf
+piYeD0EVNikMyvjltpF6fUEde9NOVrTtNTQT6kkDk+/0HF5LYgPaatv6v7fpUQHi
+kIwd6F0LTRGeWDFdsaWMdtlR1n/GxLPrOROsE8dcLt6GLavPf9rDabgva93m/JD6
+XW+Ne+MPEwqS8dAmFGhZd0gju6AtKFoSHnIf5pSQN6fSZUF/JQtHLVprAKKWKDiS
+ZwmWbmrZR2aofLD/VRpetabajnZlv9EeWloQwvUsw1C1hkAmmtFeeXtg7ePwrOzo
+6CnmcUJwOmi+LWqQV4A+58RZPFKaZoC5pzaKd0OYB8eZ8HB1F41UjGJgheX5Cyl4
++amfF3l8dSq1AgMBAAGjgZAwgY0wHQYDVR0OBBYEFM9VSq4pGydjtX92Beul4+ml
+jBKtMB8GA1UdIwQYMBaAFM9VSq4pGydjtX92Beul4+mljBKtMA8GA1UdEwEB/wQF
+MAMBAf8wJQYDVR0RBB4wHIIac3RvcmFnZS5zZWVkMy5sb2tpLm5ldHdvcmswEwYD
+VR0lBAwwCgYIKwYBBQUHAwEwDQYJKoZIhvcNAQELBQADggEBAAYxmhhkcKE1n6g1
+JqOa3UCBo4EfbqY5+FDZ0FVqv/cwemwVpKLbe6luRIS8poomdPCyMOS45V7wN3H9
+cFpfJ1TW19ydPVKmCXrl29ngmnY1q7YDwE/4qi3VK/UiqDkTHMKWjVPkenOyi8u6
+VVQANXSnKrn6GtigNFjGyD38O+j7AUSXBtXOJczaoF6r6BWgwQZ2WmgjuwvKTWSN
+4r8uObERoAQYVaeXfgdr4e9X/JdskBDaLFfoW/rrSozHB4FqVNFW96k+aIUgRa5p
+9kv115QcBPCSh9qOyTHij4tswS6SyOFaiKrNC4hgHQXP4QgioKmtsR/2Y+qJ6ddH
+6oo+4QU=
+-----END CERTIFICATE-----
diff --git a/app/src/main/res/xml/network_security_configuration.xml b/app/src/main/res/xml/network_security_configuration.xml
index 85285232de..e0a3502bc1 100644
--- a/app/src/main/res/xml/network_security_configuration.xml
+++ b/app/src/main/res/xml/network_security_configuration.xml
@@ -3,4 +3,22 @@
     <domain-config cleartextTrafficPermitted="true">
         <domain includeSubdomains="true">127.0.0.1</domain>
     </domain-config>
+    <domain-config cleartextTrafficPermitted="false">
+        <domain includeSubdomains="false">public.loki.foundation</domain>
+        <trust-anchors>
+            <certificates src="@raw/lf_session_cert"/>
+        </trust-anchors>
+    </domain-config>
+    <domain-config cleartextTrafficPermitted="false">
+        <domain includeSubdomains="false">storage.seed1.loki.network</domain>
+        <trust-anchors>
+            <certificates src="@raw/seed1cert"/>
+        </trust-anchors>
+    </domain-config>
+    <domain-config cleartextTrafficPermitted="false">
+        <domain includeSubdomains="false">storage.seed3.loki.network</domain>
+        <trust-anchors>
+            <certificates src="@raw/seed3cert"/>
+        </trust-anchors>
+    </domain-config>
 </network-security-config>
\ No newline at end of file
diff --git a/libsession/src/main/java/org/session/libsession/snode/SnodeAPI.kt b/libsession/src/main/java/org/session/libsession/snode/SnodeAPI.kt
index 98b711af60..9be9db1d29 100644
--- a/libsession/src/main/java/org/session/libsession/snode/SnodeAPI.kt
+++ b/libsession/src/main/java/org/session/libsession/snode/SnodeAPI.kt
@@ -2,21 +2,19 @@
 
 package org.session.libsession.snode
 
+import android.os.Build
 import nl.komponents.kovenant.*
 import nl.komponents.kovenant.functional.bind
 import nl.komponents.kovenant.functional.map
-
 import org.session.libsession.snode.utilities.getRandomElement
-
-import org.session.libsignal.utilities.logging.Log
-import org.session.libsignal.service.loki.api.utilities.HTTP
 import org.session.libsignal.service.loki.api.Snode
+import org.session.libsignal.service.loki.api.utilities.HTTP
 import org.session.libsignal.service.loki.database.LokiAPIDatabaseProtocol
 import org.session.libsignal.service.loki.utilities.Broadcaster
 import org.session.libsignal.service.loki.utilities.prettifiedDescription
 import org.session.libsignal.service.loki.utilities.retryIfNeeded
 import org.session.libsignal.utilities.*
-
+import org.session.libsignal.utilities.logging.Log
 import java.security.SecureRandom
 
 object SnodeAPI {
@@ -36,7 +34,14 @@ object SnodeAPI {
     private val maxRetryCount = 6
     private val minimumSnodePoolCount = 64
     private val minimumSwarmSnodeCount = 2
-    private val seedNodePool: Set<String> = setOf( "https://storage.seed1.loki.network", "https://storage.seed3.loki.network", "https://public.loki.foundation" )
+
+    // use port 4433 if API level can handle network security config and enforce pinned certificates
+    private val seedPort = if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) 443 else 4433
+    private val seedNodePool: Set<String> = setOf(
+            "https://storage.seed1.loki.network:$seedPort",
+            "https://storage.seed3.loki.network:$seedPort",
+            "https://public.loki.foundation:$seedPort"
+    )
     internal val snodeFailureThreshold = 4
     private val targetSwarmSnodeCount = 2
 
diff --git a/libsignal/src/main/java/org/session/libsignal/service/loki/api/SwarmAPI.kt b/libsignal/src/main/java/org/session/libsignal/service/loki/api/SwarmAPI.kt
index f42f772c1e..26dbf698e6 100644
--- a/libsignal/src/main/java/org/session/libsignal/service/loki/api/SwarmAPI.kt
+++ b/libsignal/src/main/java/org/session/libsignal/service/loki/api/SwarmAPI.kt
@@ -1,17 +1,18 @@
 package org.session.libsignal.service.loki.api
 
+import android.os.Build
 import nl.komponents.kovenant.Promise
 import nl.komponents.kovenant.deferred
 import nl.komponents.kovenant.functional.bind
 import nl.komponents.kovenant.functional.map
 import nl.komponents.kovenant.task
-import org.session.libsignal.utilities.logging.Log
 import org.session.libsignal.service.loki.api.utilities.HTTP
 import org.session.libsignal.service.loki.database.LokiAPIDatabaseProtocol
-import org.session.libsignal.utilities.ThreadUtils
 import org.session.libsignal.service.loki.utilities.getRandomElement
 import org.session.libsignal.service.loki.utilities.prettifiedDescription
 import org.session.libsignal.service.loki.utilities.retryIfNeeded
+import org.session.libsignal.utilities.ThreadUtils
+import org.session.libsignal.utilities.logging.Log
 import java.security.SecureRandom
 import java.util.*
 
@@ -23,7 +24,14 @@ class SwarmAPI private constructor(private val database: LokiAPIDatabaseProtocol
         set(newValue) { database.setSnodePool(newValue) }
 
     companion object {
-        private val seedNodePool: Set<String> = setOf( "https://storage.seed1.loki.network", "https://storage.seed3.loki.network", "https://public.loki.foundation" )
+
+        // use port 4433 if API level can handle network security config and enforce pinned certificates
+        private val seedPort = if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) 443 else 4433
+        private val seedNodePool: Set<String> = setOf(
+                "https://storage.seed1.loki.network:$seedPort",
+                "https://storage.seed3.loki.network:$seedPort",
+                "https://public.loki.foundation:$seedPort"
+        )
 
         // region Settings
         private val minimumSnodePoolCount = 64