diff --git a/README.md b/README.md
index 4409f19..fbe2513 100644
--- a/README.md
+++ b/README.md
@@ -132,7 +132,8 @@ pipelines:
           logrepl.publicationName: "conduitpub"
           # LogreplSlotName determines the replication slot name in case the
           # connector uses logical replication to listen to changes (see
-          # CDCMode).
+          # CDCMode). Can only contain lower-case letters, numbers, and the
+          # underscore character.
           # Type: string
           # Required: no
           logrepl.slotName: "conduitslot"
diff --git a/connector.yaml b/connector.yaml
index a4bfbb8..14ae7b6 100644
--- a/connector.yaml
+++ b/connector.yaml
@@ -136,9 +136,12 @@ specification:
         description: |-
           LogreplSlotName determines the replication slot name in case the
           connector uses logical replication to listen to changes (see CDCMode).
+          Can only contain lower-case letters, numbers, and the underscore character.
         type: string
         default: conduitslot
-        validations: []
+        validations:
+          - type: regex
+            value: ^[a-z0-9_]+$
       - name: logrepl.withAvroSchema
         description: |-
           WithAvroSchema determines whether the connector should attach an avro schema on each
diff --git a/source/config.go b/source/config.go
index ae531e1..4d71cf9 100644
--- a/source/config.go
+++ b/source/config.go
@@ -69,7 +69,8 @@ type Config struct {
 	LogreplPublicationName string `json:"logrepl.publicationName" default:"conduitpub"`
 	// LogreplSlotName determines the replication slot name in case the
 	// connector uses logical replication to listen to changes (see CDCMode).
-	LogreplSlotName string `json:"logrepl.slotName" default:"conduitslot"`
+	// Can only contain lower-case letters, numbers, and the underscore character.
+	LogreplSlotName string `json:"logrepl.slotName" validate:"regex=^[a-z0-9_]+$" default:"conduitslot"`
 
 	// LogreplAutoCleanup determines if the replication slot and publication should be
 	// removed when the connector is deleted.
diff --git a/source/logrepl/internal/publication_test.go b/source/logrepl/internal/publication_test.go
index 081689e..f04a707 100644
--- a/source/logrepl/internal/publication_test.go
+++ b/source/logrepl/internal/publication_test.go
@@ -27,7 +27,7 @@ func TestCreatePublication(t *testing.T) {
 	ctx := test.Context(t)
 	pool := test.ConnectPool(ctx, t, test.RegularConnString)
 
-	pubNames := []string{"testpub", "123", "test-hyphen", "test=equal"}
+	pubNames := []string{"testpub", "123", "test-hyphen", "test:semicolon", "test.dot", "test=equal"}
 	pubParams := [][]string{
 		nil,
 		{"publish = 'insert'"},
diff --git a/source_integration_test.go b/source_integration_test.go
index 044b079..ac044cb 100644
--- a/source_integration_test.go
+++ b/source_integration_test.go
@@ -19,6 +19,8 @@ import (
 	"strings"
 	"testing"
 
+	"github.com/conduitio/conduit-commons/config"
+	"github.com/conduitio/conduit-connector-postgres/source"
 	"github.com/conduitio/conduit-connector-postgres/source/logrepl"
 	"github.com/conduitio/conduit-connector-postgres/test"
 	sdk "github.com/conduitio/conduit-connector-sdk"
@@ -66,3 +68,46 @@ func TestSource_Open(t *testing.T) {
 		is.NoErr(s.Teardown(ctx))
 	}()
 }
+
+func TestSource_ParseConfig(t *testing.T) {
+	testCases := []struct {
+		name    string
+		cfg     config.Config
+		wantErr bool
+	}{
+		{
+			name: "valid postgres replication slot name",
+			cfg: config.Config{
+				"url":              "postgresql://meroxauser:meroxapass@127.0.0.1:5432/meroxadb",
+				"tables":           "table1,table2",
+				"cdcMode":          "logrepl",
+				"logrepl.slotName": "valid_slot_name",
+			},
+			wantErr: false,
+		}, {
+			name: "invalid postgres replication slot name",
+			cfg: config.Config{
+				"url":              "postgresql://meroxauser:meroxapass@127.0.0.1:5432/meroxadb",
+				"tables":           "table1,table2",
+				"cdcMode":          "logrepl",
+				"logrepl.slotName": "invalid:slot.name",
+			},
+			wantErr: true,
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			is := is.New(t)
+
+			var cfg source.Config
+			err := sdk.Util.ParseConfig(context.Background(), tc.cfg, cfg, Connector.NewSpecification().SourceParams)
+
+			if tc.wantErr {
+				is.True(err != nil)
+				return
+			}
+			is.NoErr(err)
+		})
+	}
+}