diff --git a/src/DIRAC/Resources/Computing/SingularityComputingElement.py b/src/DIRAC/Resources/Computing/SingularityComputingElement.py
index d8bb1cf4b99..f3cfed99b90 100644
--- a/src/DIRAC/Resources/Computing/SingularityComputingElement.py
+++ b/src/DIRAC/Resources/Computing/SingularityComputingElement.py
@@ -421,7 +421,7 @@ def submitJob(self, executableFile, proxy=None, **kwargs):
         # if there's a max RAM available to the job, use that
         if self.maxRAM:
             self.ceParameters["MemoryLimitMB"] = min(
-                self.maxRAM, self.ceParameters.get("MemoryLimitMB", 1024 * 1024)
+                self.maxRAM, int(self.ceParameters.get("MemoryLimitMB", 1024 * 1024))
             )  # 1024 * 1024 is an arbitrary large number
         result = CG2Manager().systemCall(
             0, cmd, callbackFunction=self.sendOutput, env=self.__getEnv(), ceParameters=self.ceParameters
diff --git a/src/DIRAC/WorkloadManagementSystem/Utilities/JobParameters.py b/src/DIRAC/WorkloadManagementSystem/Utilities/JobParameters.py
index 0c530c261ae..92b95f3a51d 100644
--- a/src/DIRAC/WorkloadManagementSystem/Utilities/JobParameters.py
+++ b/src/DIRAC/WorkloadManagementSystem/Utilities/JobParameters.py
@@ -242,7 +242,7 @@ def getAvailableRAM(siteName=None, gridCE=None, queue=None):
         gLogger.info("Looking in", csPath)
         availableRAM = gConfig.getValue(csPath, None)
         if availableRAM:
-            return availableRAM
+            return int(availableRAM)
 
     # 3) checks if 'WholeNode' is one of the used tags
     # Tags of the CE
@@ -277,6 +277,6 @@ def getRAMForJob(jobID):
     # from /Resources/Computing/JobLimits/jobID/MaxRAM (set by PoolComputingElement)
     ram = gConfig.getValue(f"Resources/Computing/JobLimits/{jobID}/MaxRAM")
     if ram:
-        return ram
+        return int(ram)
 
     return getAvailableRAM()