diff --git a/score_params.go b/score_params.go
index e70d3c84fff0ea0d0c760af0273fb88fcb8ce8b9..2355c502b62fe93ddb224022ace5fd51e8c6a5d7 100644
--- a/score_params.go
+++ b/score_params.go
@@ -199,47 +199,47 @@ func (p *PeerScoreParams) validate() error {
 
 func (p *TopicScoreParams) validate() error {
 	// make sure we have a sane topic weight
-	if p.TopicWeight < 0 {
-		return fmt.Errorf("invalid topic weight; must be >= 0")
+	if p.TopicWeight < 0 || isInvalidNumber(p.TopicWeight) {
+		return fmt.Errorf("invalid topic weight; must be >= 0 and a valid number")
 	}
 
 	// check P1
 	if p.TimeInMeshQuantum == 0 {
 		return fmt.Errorf("invalid TimeInMeshQuantum; must be non zero")
 	}
-	if p.TimeInMeshWeight < 0 {
-		return fmt.Errorf("invalid TimeInMeshWeight; must be positive (or 0 to disable)")
+	if p.TimeInMeshWeight < 0 || isInvalidNumber(p.TimeInMeshWeight) {
+		return fmt.Errorf("invalid TimeInMeshWeight; must be positive (or 0 to disable) and a valid number")
 	}
 	if p.TimeInMeshWeight != 0 && p.TimeInMeshQuantum <= 0 {
 		return fmt.Errorf("invalid TimeInMeshQuantum; must be positive")
 	}
-	if p.TimeInMeshWeight != 0 && p.TimeInMeshCap <= 0 {
-		return fmt.Errorf("invalid TimeInMeshCap; must be positive")
+	if p.TimeInMeshWeight != 0 && (p.TimeInMeshCap <= 0 || isInvalidNumber(p.TimeInMeshCap)) {
+		return fmt.Errorf("invalid TimeInMeshCap; must be positive and a valid number")
 	}
 
 	// check P2
-	if p.FirstMessageDeliveriesWeight < 0 {
-		return fmt.Errorf("invallid FirstMessageDeliveriesWeight; must be positive (or 0 to disable)")
+	if p.FirstMessageDeliveriesWeight < 0 || isInvalidNumber(p.FirstMessageDeliveriesWeight) {
+		return fmt.Errorf("invallid FirstMessageDeliveriesWeight; must be positive (or 0 to disable) and a valid number")
 	}
-	if p.FirstMessageDeliveriesWeight != 0 && (p.FirstMessageDeliveriesDecay <= 0 || p.FirstMessageDeliveriesDecay >= 1) {
+	if p.FirstMessageDeliveriesWeight != 0 && (p.FirstMessageDeliveriesDecay <= 0 || p.FirstMessageDeliveriesDecay >= 1 || isInvalidNumber(p.FirstMessageDeliveriesDecay)) {
 		return fmt.Errorf("invalid FirstMessageDeliveriesDecay; must be between 0 and 1")
 	}
-	if p.FirstMessageDeliveriesWeight != 0 && p.FirstMessageDeliveriesCap <= 0 {
-		return fmt.Errorf("invalid FirstMessageDeliveriesCap; must be positive")
+	if p.FirstMessageDeliveriesWeight != 0 && (p.FirstMessageDeliveriesCap <= 0 || isInvalidNumber(p.FirstMessageDeliveriesCap)) {
+		return fmt.Errorf("invalid FirstMessageDeliveriesCap; must be positive and a valid number")
 	}
 
 	// check P3
-	if p.MeshMessageDeliveriesWeight > 0 {
-		return fmt.Errorf("invalid MeshMessageDeliveriesWeight; must be negative (or 0 to disable)")
+	if p.MeshMessageDeliveriesWeight > 0 || isInvalidNumber(p.MeshFailurePenaltyWeight) {
+		return fmt.Errorf("invalid MeshMessageDeliveriesWeight; must be negative (or 0 to disable) and a valid number")
 	}
-	if p.MeshMessageDeliveriesWeight != 0 && (p.MeshMessageDeliveriesDecay <= 0 || p.MeshMessageDeliveriesDecay >= 1) {
+	if p.MeshMessageDeliveriesWeight != 0 && (p.MeshMessageDeliveriesDecay <= 0 || p.MeshMessageDeliveriesDecay >= 1 || isInvalidNumber(p.MeshMessageDeliveriesDecay)) {
 		return fmt.Errorf("invalid MeshMessageDeliveriesDecay; must be between 0 and 1")
 	}
-	if p.MeshMessageDeliveriesWeight != 0 && p.MeshMessageDeliveriesCap <= 0 {
-		return fmt.Errorf("invalid MeshMessageDeliveriesCap; must be positive")
+	if p.MeshMessageDeliveriesWeight != 0 && (p.MeshMessageDeliveriesCap <= 0 || isInvalidNumber(p.MeshMessageDeliveriesCap)) {
+		return fmt.Errorf("invalid MeshMessageDeliveriesCap; must be positive and a valid number")
 	}
-	if p.MeshMessageDeliveriesWeight != 0 && p.MeshMessageDeliveriesThreshold <= 0 {
-		return fmt.Errorf("invalid MeshMessageDeliveriesThreshold; must be positive")
+	if p.MeshMessageDeliveriesWeight != 0 && (p.MeshMessageDeliveriesThreshold <= 0 || isInvalidNumber(p.MeshMessageDeliveriesThreshold)) {
+		return fmt.Errorf("invalid MeshMessageDeliveriesThreshold; must be positive and a valid number")
 	}
 	if p.MeshMessageDeliveriesWindow < 0 {
 		return fmt.Errorf("invalid MeshMessageDeliveriesWindow; must be non-negative")
@@ -249,18 +249,18 @@ func (p *TopicScoreParams) validate() error {
 	}
 
 	// check P3b
-	if p.MeshFailurePenaltyWeight > 0 {
-		return fmt.Errorf("invalid MeshFailurePenaltyWeight; must be negative (or 0 to disable)")
+	if p.MeshFailurePenaltyWeight > 0 || isInvalidNumber(p.MeshFailurePenaltyWeight) {
+		return fmt.Errorf("invalid MeshFailurePenaltyWeight; must be negative (or 0 to disable) and a valid number")
 	}
-	if p.MeshFailurePenaltyWeight != 0 && (p.MeshFailurePenaltyDecay <= 0 || p.MeshFailurePenaltyDecay >= 1) {
+	if p.MeshFailurePenaltyWeight != 0 && (isInvalidNumber(p.MeshFailurePenaltyDecay) || p.MeshFailurePenaltyDecay <= 0 || p.MeshFailurePenaltyDecay >= 1) {
 		return fmt.Errorf("invalid MeshFailurePenaltyDecay; must be between 0 and 1")
 	}
 
 	// check P4
-	if p.InvalidMessageDeliveriesWeight > 0 {
-		return fmt.Errorf("invalid InvalidMessageDeliveriesWeight; must be negative (or 0 to disable)")
+	if p.InvalidMessageDeliveriesWeight > 0 || isInvalidNumber(p.InvalidMessageDeliveriesWeight) {
+		return fmt.Errorf("invalid InvalidMessageDeliveriesWeight; must be negative (or 0 to disable) and a valid number")
 	}
-	if p.InvalidMessageDeliveriesDecay <= 0 || p.InvalidMessageDeliveriesDecay >= 1 {
+	if p.InvalidMessageDeliveriesDecay <= 0 || p.InvalidMessageDeliveriesDecay >= 1 || isInvalidNumber(p.InvalidMessageDeliveriesDecay) {
 		return fmt.Errorf("invalid InvalidMessageDeliveriesDecay; must be between 0 and 1")
 	}
 
@@ -285,3 +285,9 @@ func ScoreParameterDecayWithBase(decay time.Duration, base time.Duration, decayT
 	ticks := float64(decay / base)
 	return math.Pow(decayToZero, 1/ticks)
 }
+
+// checks whether the provided floating-point number is `Not a Number`
+// or an infinite number.
+func isInvalidNumber(num float64) bool {
+	return math.IsNaN(num) || math.IsInf(num, 0)
+}
diff --git a/score_params_test.go b/score_params_test.go
index 45018d713a54bf991291cde6161dfb71f1f2b57b..18188fa6c8e9806a76d49861c8f05e8e347ee42d 100644
--- a/score_params_test.go
+++ b/score_params_test.go
@@ -1,6 +1,7 @@
 package pubsub
 
 import (
+	"math"
 	"testing"
 	"time"
 
@@ -254,6 +255,40 @@ func TestPeerScoreParamsValidation(t *testing.T) {
 		t.Fatal("expected validation failure")
 	}
 
+	// Checks the topic parameters for invalid values such as infinite and
+	// NaN numbers.
+	if (&PeerScoreParams{
+		TopicScoreCap:               1,
+		AppSpecificScore:            appScore,
+		DecayInterval:               time.Second,
+		DecayToZero:                 0.01,
+		IPColocationFactorWeight:    -1,
+		IPColocationFactorThreshold: 1,
+		Topics: map[string]*TopicScoreParams{
+			"test": &TopicScoreParams{
+				TopicWeight:                     math.Inf(0),
+				TimeInMeshWeight:                math.NaN(),
+				TimeInMeshQuantum:               time.Second,
+				TimeInMeshCap:                   10,
+				FirstMessageDeliveriesWeight:    math.Inf(1),
+				FirstMessageDeliveriesDecay:     0.5,
+				FirstMessageDeliveriesCap:       10,
+				MeshMessageDeliveriesWeight:     math.Inf(-1),
+				MeshMessageDeliveriesDecay:      math.NaN(),
+				MeshMessageDeliveriesCap:        math.Inf(0),
+				MeshMessageDeliveriesThreshold:  5,
+				MeshMessageDeliveriesWindow:     time.Millisecond,
+				MeshMessageDeliveriesActivation: time.Second,
+				MeshFailurePenaltyWeight:        -1,
+				MeshFailurePenaltyDecay:         math.NaN(),
+				InvalidMessageDeliveriesWeight:  math.Inf(0),
+				InvalidMessageDeliveriesDecay:   math.NaN(),
+			},
+		},
+	}).validate() == nil {
+		t.Fatal("expected validation failure")
+	}
+
 }
 
 func TestScoreParameterDecay(t *testing.T) {