diff --git a/pySim/euicc.py b/pySim/euicc.py
index 63748188..069a5c7f 100644
--- a/pySim/euicc.py
+++ b/pySim/euicc.py
@@ -177,7 +177,7 @@ class ProfileMgmtOperation(BER_TLV_IE, tag=0x81):
 class ListNotificationReq(BER_TLV_IE, tag=0xbf28, nested=[ProfileMgmtOperation]):
     pass
 class SeqNumber(BER_TLV_IE, tag=0x80):
-    _construct = GreedyInteger()
+    _construct = Asn1DerInteger()
 class NotificationAddress(BER_TLV_IE, tag=0x0c):
     _construct = Utf8Adapter(GreedyBytes)
 class Iccid(BER_TLV_IE, tag=0x5a):
@@ -304,9 +304,9 @@ class EimFqdn(BER_TLV_IE, tag=0x81):
 class EimIdType(BER_TLV_IE, tag=0x82):
     _construct = Enum(Int8ub, eimIdTypeOid=1, eimIdTypeFqdn=2, eimIdTypeProprietary=3)
 class CounterValue(BER_TLV_IE, tag=0x83):
-    _construct = GreedyInteger
+    _construct = Asn1DerInteger()
 class AssociationToken(BER_TLV_IE, tag=0x84):
-    _construct = GreedyInteger
+    _construct = Asn1DerInteger()
 class EimSupportedProtocol(BER_TLV_IE, tag=0x87):
     _construct = Enum(Int8ub, eimRetrieveHttps=0, eimRetrieveCoaps=1, eimInjectHttps=2, eimInjectCoaps=3,
                       eimProprietary=4)
diff --git a/requirements.txt b/requirements.txt
index 2251a0a1..58473cae 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ cmd2>=1.5
 jsonpath-ng
 construct>=2.10.70
 bidict
-pyosmocom>=0.0.3
+pyosmocom>=0.0.6
 pyyaml>=5.1
 termcolor
 colorlog
diff --git a/setup.py b/setup.py
index aa92f179..e353f8ac 100644
--- a/setup.py
+++ b/setup.py
@@ -24,7 +24,7 @@ setup(
         "jsonpath-ng",
         "construct >= 2.10.70",
         "bidict",
-        "pyosmocom >= 0.0.3",
+        "pyosmocom >= 0.0.6",
         "pyyaml >= 5.1",
         "termcolor",
         "colorlog",